Current Electricity Questions and Answers
![Charge q and q are placed at points A and B respectively which are a distance 2L apart C is the mid point between A and B The work done in moving a charge along the semicircle CRD is A B C 99 4 L 99 2TEL q9 6REL D C 99 6TEL R B D](https://media.kunduz.com/media/sug-question-candidate/20200730034909792748-665061.jpg?w=256)
Physics
Current ElectricityCharge q and q are placed at points A and B respectively which are a distance 2L apart C is the mid point between A and B The work done in moving a charge along the semicircle CRD is A B C 99 4 L 99 2TEL q9 6REL D C 99 6TEL R B D
![6 The effective resistance between points A and Bis a R A b R3 R wwwww C 2R 24 2R wwwwww c 2R 3 B d 3R 5](https://media.kunduz.com/media/sug-question-candidate/20200730090440555936-1897224.jpg?w=256)
Physics
Current Electricity6 The effective resistance between points A and Bis a R A b R3 R wwwww C 2R 24 2R wwwwww c 2R 3 B d 3R 5
![Consider the circuit shown in the figure Given E 5 Volts and R 1 22 Take Vo 0 volt P Q S Codes A B C S 2 3 4 3 2 1 1 2 List I Current through OA in amperes Current through AB in amperes Potential at A in volts Potential at B in volts P Q R 1 4 4 A 4 R www H R www G R www 2E www b R E R B R www R www 2E www 249 R ww 2E www F R www R 2E www www R 1 2 234 3 R 4 C www www R D R E List II 78 1 2](https://media.kunduz.com/media/sug-question-candidate/20200729152137832441-1896448.jpg?w=256)
Physics
Current ElectricityConsider the circuit shown in the figure Given E 5 Volts and R 1 22 Take Vo 0 volt P Q S Codes A B C S 2 3 4 3 2 1 1 2 List I Current through OA in amperes Current through AB in amperes Potential at A in volts Potential at B in volts P Q R 1 4 4 A 4 R www H R www G R www 2E www b R E R B R www R www 2E www 249 R ww 2E www F R www R 2E www www R 1 2 234 3 R 4 C www www R D R E List II 78 1 2
![An electric cable of copper has just one wire of radius 9 mm Its resistance is 5 ohm This single copp of cable is replaced by 6 different well insulated copper wire each of radius 3 mm The total resistane 13 cable will now be equal to B 9092 C 7 592 D 27092 A 450 6 A uniform wire of resistance 20 ohm having resistance 152 m is bent int the form of a circle as shown in 19 If the equilvalent resistance between M and N is 1 892 then the length of the shorter section is 5 M N 104 A 2m B 5m C 1 8m D 18m Resistivity of a conductor in which a current density 2 5 Am2 is found to exist when an electric field is applied to it is pq 10 A 60m B 72m EC 40m A D 80m](https://media.kunduz.com/media/sug-question-candidate/20201016130905557057-2170480.jpg?w=256)
Physics
Current ElectricityAn electric cable of copper has just one wire of radius 9 mm Its resistance is 5 ohm This single copp of cable is replaced by 6 different well insulated copper wire each of radius 3 mm The total resistane 13 cable will now be equal to B 9092 C 7 592 D 27092 A 450 6 A uniform wire of resistance 20 ohm having resistance 152 m is bent int the form of a circle as shown in 19 If the equilvalent resistance between M and N is 1 892 then the length of the shorter section is 5 M N 104 A 2m B 5m C 1 8m D 18m Resistivity of a conductor in which a current density 2 5 Am2 is found to exist when an electric field is applied to it is pq 10 A 60m B 72m EC 40m A D 80m
![A wire of resistance 0 1 22cm 1 is bent to form a square ABCD of side 10 cm A similar wire is connected between the corners B and D to form the diagonal BD If a 2V battery of negligible internal resistance is connected across A and C then the total power dissipated is 1 2 W 3 4 W 2 3 W 4 5 W](https://media.kunduz.com/media/sug-question-candidate/20200917060436601229-1903025.jpg?w=256)
Physics
Current ElectricityA wire of resistance 0 1 22cm 1 is bent to form a square ABCD of side 10 cm A similar wire is connected between the corners B and D to form the diagonal BD If a 2V battery of negligible internal resistance is connected across A and C then the total power dissipated is 1 2 W 3 4 W 2 3 W 4 5 W
![IBC IDC IDD IBB IAD IA B 1 2 A A D Example 155 Twelve wires each having a resistance of r re connected to form a skeleton cube find the resistance of he cube between the two corners of the same edge Solution Let a current x 2y enter the junction A of the cube ABCDEFGH From the symmetry of the](https://media.kunduz.com/media/sug-question-candidate/20200729165531106370-1896574.jpg?w=256)
Physics
Current ElectricityIBC IDC IDD IBB IAD IA B 1 2 A A D Example 155 Twelve wires each having a resistance of r re connected to form a skeleton cube find the resistance of he cube between the two corners of the same edge Solution Let a current x 2y enter the junction A of the cube ABCDEFGH From the symmetry of the
![Which switch in the circuit Fig 4 88 when closed will produce short circuiting a A c C A B b B d none of the above Lamp Resistance](https://media.kunduz.com/media/sug-question-candidate/20200729103720366415-693813.jpg?w=256)
Physics
Current ElectricityWhich switch in the circuit Fig 4 88 when closed will produce short circuiting a A c C A B b B d none of the above Lamp Resistance
![I In the given circuit the potential of the point E is a zero b 8 V c d 3 V A B 8 V Ewwww 10 www 592 WD H form of a circle Th](https://media.kunduz.com/media/sug-question-candidate/20200729073442550230-1896019.jpg?w=256)
Physics
Current ElectricityI In the given circuit the potential of the point E is a zero b 8 V c d 3 V A B 8 V Ewwww 10 www 592 WD H form of a circle Th
![in the network shown in given figure find the current I through the 10 V battery A B 10 V 1 22 wwwww HA 52 wwwww 1 D 3Q www E F](https://media.kunduz.com/media/sug-question-candidate/20200723033622318415-1879999.jpg?w=256)
Physics
Current Electricityin the network shown in given figure find the current I through the 10 V battery A B 10 V 1 22 wwwww HA 52 wwwww 1 D 3Q www E F
![4 In the diagram given alongside the potential difference across PR is 14 volts Calculate a the equivalent resistance of the network QR b the current flowing through PQ c the potential difference across PQ d the current flowing through the 3 ohms resistor P 52 Q 392 R 602 Ans a 22 b 2 A c 10 V d 1 33 A](https://media.kunduz.com/media/sug-question-candidate/20200728115010137723-1895148.jpg?w=256)
Physics
Current Electricity4 In the diagram given alongside the potential difference across PR is 14 volts Calculate a the equivalent resistance of the network QR b the current flowing through PQ c the potential difference across PQ d the current flowing through the 3 ohms resistor P 52 Q 392 R 602 Ans a 22 b 2 A c 10 V d 1 33 A
![A group of N cells each of whose emf varies directly with the internal resistance as per the equation E 1 5 r are connected as shown in the figure The current in the circuit is 1 5 1 A N r Ta 3 2 0 51 A 01015 A](https://media.kunduz.com/media/sug-question-candidate/20201015153119765306-2007559.jpg?w=256)
Physics
Current ElectricityA group of N cells each of whose emf varies directly with the internal resistance as per the equation E 1 5 r are connected as shown in the figure The current in the circuit is 1 5 1 A N r Ta 3 2 0 51 A 01015 A
![49 The effective resistance between A and B in the network shown is 73 A 30 9 1 34 22 3 17 Q 90 92 40 B ww 30 Q 30 2 2 30 9 4 10 Q](https://media.kunduz.com/media/sug-question-candidate/20200728074828397708-1894754.jpg?w=256)
Physics
Current Electricity49 The effective resistance between A and B in the network shown is 73 A 30 9 1 34 22 3 17 Q 90 92 40 B ww 30 Q 30 2 2 30 9 4 10 Q
![D Twelve equal resistances each of 2 2 form the edges of a cube If a 2 volt battery having internal resistance 0 12 is connected between two adjacement corners of a cube then the current in ampere drawn from battery is a 60 53 b 30 19 c 20 29 d None of the above](https://media.kunduz.com/media/sug-question-candidate/20200916044721399496-1941069.jpg?w=256)
Physics
Current ElectricityD Twelve equal resistances each of 2 2 form the edges of a cube If a 2 volt battery having internal resistance 0 12 is connected between two adjacement corners of a cube then the current in ampere drawn from battery is a 60 53 b 30 19 c 20 29 d None of the above
![but from N to P whereas through R it flows from P to N rough the e The electrolyte through which a current flows has resistance r called the internal resistance Consider situation when](https://media.kunduz.com/media/sug-question-candidate/20200728130748865335-1889022.jpg?w=256)
Physics
Current Electricitybut from N to P whereas through R it flows from P to N rough the e The electrolyte through which a current flows has resistance r called the internal resistance Consider situation when
![4 A resistance wire connected in the left gap of a metre bridge balances a 10 resistance in the right gap at a point which divides the bridge wire in the ratio 3 2 If the length of the resistance wire is 1 5 m then the length of 1 of the resistance wire is 1 5 10 m 1 5 10 m 1 0 10 2 m 10x10 1 m 1 2 3 1 5 0 g](https://media.kunduz.com/media/sug-question-candidate/20200922170301844946-2106866.jpg?w=256)
Physics
Current Electricity4 A resistance wire connected in the left gap of a metre bridge balances a 10 resistance in the right gap at a point which divides the bridge wire in the ratio 3 2 If the length of the resistance wire is 1 5 m then the length of 1 of the resistance wire is 1 5 10 m 1 5 10 m 1 0 10 2 m 10x10 1 m 1 2 3 1 5 0 g
![16 A circuit element is placed in a closed box At time t 0 a constant current generator supplying a current of 1 A is connected across the box Potential difference across the box varies according to graph shown in the figure The element in the box is V volt 292 19X9 8 24 a a resistance of 202 b a battery of emf 6 V c an inductance of 2 H d a capacitance of 0 5 F t s](https://media.kunduz.com/media/sug-question-candidate/20200728052529662578-693813.jpg?w=256)
Physics
Current Electricity16 A circuit element is placed in a closed box At time t 0 a constant current generator supplying a current of 1 A is connected across the box Potential difference across the box varies according to graph shown in the figure The element in the box is V volt 292 19X9 8 24 a a resistance of 202 b a battery of emf 6 V c an inductance of 2 H d a capacitance of 0 5 F t s
![he galvanometer in the circuit of figure reads zero calculate the value of the resistor R in ko assuming that the 12 V source has negligible internal resistance Pesonance 6 12 V 10 k Wire wound IRI Cell 2V Corporate Office CG Tower A 46 52 IPIA Near City Mall Jhalawar Road Kota Raj 324005 Website www resonance ac in E mail contact resonance ac in ADVCE 60](https://media.kunduz.com/media/sug-question-candidate/20201010090412260314-1332181.jpg?w=256)
Physics
Current Electricityhe galvanometer in the circuit of figure reads zero calculate the value of the resistor R in ko assuming that the 12 V source has negligible internal resistance Pesonance 6 12 V 10 k Wire wound IRI Cell 2V Corporate Office CG Tower A 46 52 IPIA Near City Mall Jhalawar Road Kota Raj 324005 Website www resonance ac in E mail contact resonance ac in ADVCE 60
![2 A nichrome wire 1 m long and 1 mm in cross section area draws 4 ampere at 2 volt The resistivity of nichrome is a 1 x 10 722 m c 4 1072 m b 2 10 2 m d 5 x 107 22 m AFMC](https://media.kunduz.com/media/sug-question-candidate/20201008091906144481-2210229.jpg?w=256)
Physics
Current Electricity2 A nichrome wire 1 m long and 1 mm in cross section area draws 4 ampere at 2 volt The resistivity of nichrome is a 1 x 10 722 m c 4 1072 m b 2 10 2 m d 5 x 107 22 m AFMC
![24 The effective resistance be for the following network is 492 P A 1 12 392 S C 122 www R ww 69 www 39 B 21 D 21 www S 592 Q Space for Rough V](https://media.kunduz.com/media/sug-question-candidate/20200727093016486961-1893752.jpg?w=256)
Physics
Current Electricity24 The effective resistance be for the following network is 492 P A 1 12 392 S C 122 www R ww 69 www 39 B 21 D 21 www S 592 Q Space for Rough V
![26 The power dissipated in 3n resistance in the 26 following circuit is R 4 5 V 1Q A 0 75 W C 1 W 202 3Q 60 RED P IR 452 B 0 25 W D 0 5 W Question Id 26 www Faworz 4 5 V 19 2 A 0 75 W C 1 W](https://media.kunduz.com/media/sug-question-candidate/20200727150807832852-1893752.jpg?w=256)
Physics
Current Electricity26 The power dissipated in 3n resistance in the 26 following circuit is R 4 5 V 1Q A 0 75 W C 1 W 202 3Q 60 RED P IR 452 B 0 25 W D 0 5 W Question Id 26 www Faworz 4 5 V 19 2 A 0 75 W C 1 W
![E R www 3R www ww 4R 2R ww I Given R 1 kn E 12V 1 1 9 mA 2 2 9 mA 1 19 mA 2E](https://media.kunduz.com/media/sug-question-candidate/20200726164926150715-1890936.jpg?w=256)
Physics
Current ElectricityE R www 3R www ww 4R 2R ww I Given R 1 kn E 12V 1 1 9 mA 2 2 9 mA 1 19 mA 2E
![6 023 x 1023 g mol Find the total negative or positive charge on a 2 g silver coin The atomic number and atomic mass of silver is 47 and 107 9 respectively Given Avogadro s number is 6 023 x 1023 g mol nitive charges in 500 cc of water Given statcoulomb Dista dynes A charge u proportionality equal to 1 So th](https://media.kunduz.com/media/sug-question-candidate/20200726043451149276-1867499.jpg?w=256)
Physics
Current Electricity6 023 x 1023 g mol Find the total negative or positive charge on a 2 g silver coin The atomic number and atomic mass of silver is 47 and 107 9 respectively Given Avogadro s number is 6 023 x 1023 g mol nitive charges in 500 cc of water Given statcoulomb Dista dynes A charge u proportionality equal to 1 So th
![dielectric of dielectric constant 3 energy stored in the capacitors to the final total energy stored is 5 In the given circuit the potential difference across the 6 F capacitor in steady state is A E 12V 1 5Q www 19 1 5 Q SHF 165 1 59 O 1 5Q 2 F 1 5 Q H 3 F 6 F B 4V D F 21](https://media.kunduz.com/media/sug-question-candidate/20200726032500382295-1892463.jpg?w=256)
Physics
Current Electricitydielectric of dielectric constant 3 energy stored in the capacitors to the final total energy stored is 5 In the given circuit the potential difference across the 6 F capacitor in steady state is A E 12V 1 5Q www 19 1 5 Q SHF 165 1 59 O 1 5Q 2 F 1 5 Q H 3 F 6 F B 4V D F 21
![In an experiment to verify Ohm s law a graph has been obtained between voltage and current as shown below The resistance is V volt 1 0 0 5 0 5 1 0 1 0 58 0 08 2 10 65 0 0810 Ti A 2 0 3 0 2 0 58 0 12 4 0 58 004 0](https://media.kunduz.com/media/sug-question-candidate/20200930125804117617-2160492.jpg?w=256)
Physics
Current ElectricityIn an experiment to verify Ohm s law a graph has been obtained between voltage and current as shown below The resistance is V volt 1 0 0 5 0 5 1 0 1 0 58 0 08 2 10 65 0 0810 Ti A 2 0 3 0 2 0 58 0 12 4 0 58 004 0
![Moving Charges and Ma A long straight conductor is bent in form of a right angle as show p q where p 0 q 0 is Moi p q 4 1 1 pq p q 2 Hoi H p q p q 4 q y axis O x axis 2 4 4 1 M p q r Moi 4 q 1 pq p q 2 2 p q p q 2 at poir](https://media.kunduz.com/media/sug-question-candidate/20200725051354557571-1889809.jpg?w=256)
Physics
Current ElectricityMoving Charges and Ma A long straight conductor is bent in form of a right angle as show p q where p 0 q 0 is Moi p q 4 1 1 pq p q 2 Hoi H p q p q 4 q y axis O x axis 2 4 4 1 M p q r Moi 4 q 1 pq p q 2 2 p q p q 2 at poir
![In the circuits shown below the readings of the voltmeters and the ammeters will be 10 12 www HH 10 V Circuit 1 a V V and i 1 b V V and i 1 c V V and i i 10 12 www 1092 10 V Circuit 2](https://media.kunduz.com/media/sug-question-candidate/20200725113015571055-1891221.jpg?w=256)
Physics
Current ElectricityIn the circuits shown below the readings of the voltmeters and the ammeters will be 10 12 www HH 10 V Circuit 1 a V V and i 1 b V V and i 1 c V V and i i 10 12 www 1092 10 V Circuit 2
![78 Find the reading of ammeter in figure 2 3 A b 4 A c 1 5 A d 6 A Parratell 222 ww 202 ww HH 3 V 5 F 11 A](https://media.kunduz.com/media/sug-question-candidate/20200923174454030787-2045016.jpg?w=256)
Physics
Current Electricity78 Find the reading of ammeter in figure 2 3 A b 4 A c 1 5 A d 6 A Parratell 222 ww 202 ww HH 3 V 5 F 11 A
![25 In the given circuit all resistors are of R ohm each If a wire is connected between C and B then the ratio of equivalent resistance between AB of original circuit to new circuit formed is Ao 1 1 1 RCRD R www Po 2 3 1 R E 3 1 3 R www ob](https://media.kunduz.com/media/sug-question-candidate/20200725025115641229-1869662.jpg?w=256)
Physics
Current Electricity25 In the given circuit all resistors are of R ohm each If a wire is connected between C and B then the ratio of equivalent resistance between AB of original circuit to new circuit formed is Ao 1 1 1 RCRD R www Po 2 3 1 R E 3 1 3 R www ob
![Terence between points x and y in the circuit shown below is A 1 10 volt 3 30 volt 50 2 X www 50 22 www 30 Q y M 10 2 HE 80 volt Ux vy VB 2 20 volt 4 40 volt](https://media.kunduz.com/media/sug-question-candidate/20200725163530115548-1889576.jpg?w=256)
Physics
Current ElectricityTerence between points x and y in the circuit shown below is A 1 10 volt 3 30 volt 50 2 X www 50 22 www 30 Q y M 10 2 HE 80 volt Ux vy VB 2 20 volt 4 40 volt
![Resistance R in the circuit has to be chosen such that maximum power consumed across it in that case the Power consumed by R A 1 W 10V M 20 302 B SW C 10 W D 20 W](https://media.kunduz.com/media/sug-question-candidate/20200724044950971740-1890354.jpg?w=256)
Physics
Current ElectricityResistance R in the circuit has to be chosen such that maximum power consumed across it in that case the Power consumed by R A 1 W 10V M 20 302 B SW C 10 W D 20 W
![Calculate equivalent resistance between the points A and B if A B 202 6 www 22 4 Q www tim www 4 52 422](https://media.kunduz.com/media/sug-question-candidate/20201014112357629887-2246473.jpg?w=256)
Physics
Current ElectricityCalculate equivalent resistance between the points A and B if A B 202 6 www 22 4 Q www tim www 4 52 422
![What should be the bill for the month of March for a heater of resistance 60 5 2 connected 220 V mains The cost of energy is Rs 2 per kW h and the heater is used for 3 hours daily](https://media.kunduz.com/media/sug-question-candidate/20201003125853351056-1735896.jpg?w=256)
Physics
Current ElectricityWhat should be the bill for the month of March for a heater of resistance 60 5 2 connected 220 V mains The cost of energy is Rs 2 per kW h and the heater is used for 3 hours daily
![Q 49 In the circuit shown in the figure the neon lamp lights up if potential difference across it becomes 60 V and goes out if the potential difference falls below 30 V The inductor coil has a very small resistance and emf of the cell is V 4 volt The lamp does not light when the switch is closed The neon light flashes once when the switch is opened Explain why www Coil ooooo](https://media.kunduz.com/media/sug-question-candidate/20200724143617597127-1890879.jpg?w=256)
Physics
Current ElectricityQ 49 In the circuit shown in the figure the neon lamp lights up if potential difference across it becomes 60 V and goes out if the potential difference falls below 30 V The inductor coil has a very small resistance and emf of the cell is V 4 volt The lamp does not light when the switch is closed The neon light flashes once when the switch is opened Explain why www Coil ooooo
![25 Which of the following equations is Kirchhoff s first rule as applied to the circuit given below 6 V 2 6 V 02A 13 M 209 12 20 9 20 2 9 1 1 13 0 3 1 12 13 0 26 Which of the following is not a correct equation by Kirchhoff s second law for the above circuit 1 6 201 6 20 2 0 3 20 2 6 20 3 0 27 What is the value of I in the above circuit 1 0 1 A 2 1 12 13 0 4 1 1 13 0 2 6 2013 201 0 4 6 2013 201 0 2 0 1 A 4 0 2 A 25](https://media.kunduz.com/media/sug-question-candidate/20200628224329916963-621912.jpg?w=256)
Physics
Current Electricity25 Which of the following equations is Kirchhoff s first rule as applied to the circuit given below 6 V 2 6 V 02A 13 M 209 12 20 9 20 2 9 1 1 13 0 3 1 12 13 0 26 Which of the following is not a correct equation by Kirchhoff s second law for the above circuit 1 6 201 6 20 2 0 3 20 2 6 20 3 0 27 What is the value of I in the above circuit 1 0 1 A 2 1 12 13 0 4 1 1 13 0 2 6 2013 201 0 4 6 2013 201 0 2 0 1 A 4 0 2 A 25
![04 X material of the ong Answer Type Question 24 a Define resistivity Write an expression for the resistivity of a substance Give the meaning of each symbol which occurs in it b State the SI unit of resistivity c Distinguish between resistance and resistivity d Name two factors on which the resistivity of a substance depends and two factors on which it does n embentou 4t didn e The resistance of a metal wire of length 1 m is 26 92 at 20 C If the diameter of the wire is 0 3 mm w will be the resistivity of the metal at that temperature](https://media.kunduz.com/media/sug-question-candidate/20200723164901178709-1884508.jpg?w=256)
Physics
Current Electricity04 X material of the ong Answer Type Question 24 a Define resistivity Write an expression for the resistivity of a substance Give the meaning of each symbol which occurs in it b State the SI unit of resistivity c Distinguish between resistance and resistivity d Name two factors on which the resistivity of a substance depends and two factors on which it does n embentou 4t didn e The resistance of a metal wire of length 1 m is 26 92 at 20 C If the diameter of the wire is 0 3 mm w will be the resistivity of the metal at that temperature
![39 If power consumptions in R R R3 are the same then what will be the relation between them ww R 1 R R R3 2 R R3 2R 3 R R3 4R 4 R R 4R R R](https://media.kunduz.com/media/sug-question-candidate/20200722171040781948-1888672.jpg?w=256)
Physics
Current Electricity39 If power consumptions in R R R3 are the same then what will be the relation between them ww R 1 R R R3 2 R R3 2R 3 R R3 4R 4 R R 4R R R
![ces the thermoco an e m f of 40 V C in the linear range of temperature A galvanometer of resistance 10 ohm whose sensitivity is 1 V div is employed with the thermocouple The smallest value of temperature difference that can be detected by the system will be 1 0 25 3 A A 2 0 5 C 410 1 C 23](https://media.kunduz.com/media/sug-question-candidate/20200618025557622500-1837204.jpg?w=256)
Physics
Current Electricityces the thermoco an e m f of 40 V C in the linear range of temperature A galvanometer of resistance 10 ohm whose sensitivity is 1 V div is employed with the thermocouple The smallest value of temperature difference that can be detected by the system will be 1 0 25 3 A A 2 0 5 C 410 1 C 23
![R C uus 16 At t 0 charge on capacitor is q Now switch S is closed Heat loss in 3R is x x 10 J Then find the value of x Given q 15 C C 6 55 F 971 R 2R ww shxt 0 2 of gire resistor not capacitor in 1 R R](https://media.kunduz.com/media/sug-question-candidate/20200914132830000338-1486975.jpg?w=256)
Physics
Current ElectricityR C uus 16 At t 0 charge on capacitor is q Now switch S is closed Heat loss in 3R is x x 10 J Then find the value of x Given q 15 C C 6 55 F 971 R 2R ww shxt 0 2 of gire resistor not capacitor in 1 R R
![In the circuit PR the reading of the galvanometer is same with switch S open or closed Then A IR IG B Ip IG C lg IG D IQ IR 19](https://media.kunduz.com/media/sug-question-candidate/20200721171922017066-1867190.jpg?w=256)
Physics
Current ElectricityIn the circuit PR the reading of the galvanometer is same with switch S open or closed Then A IR IG B Ip IG C lg IG D IQ IR 19
![8 A charge Q is placed at each of the two opposite corners of a square A charge q is placed at each of the other two corners If the resultant force on Q is zero then a Q 2q c Q 2 2q b Q 2q d Q 2 2q](https://media.kunduz.com/media/sug-question-candidate/20201007061415527252-2072756.jpg?w=256)
Physics
Current Electricity8 A charge Q is placed at each of the two opposite corners of a square A charge q is placed at each of the other two corners If the resultant force on Q is zero then a Q 2q c Q 2 2q b Q 2q d Q 2 2q
![In the figure the numerical values denote 4 resistances in SI units The total resistance of the circuit between a b will be ww 1 12 ohms 3 15 ohms www 3 ww 20 wwww 15 ww 20 www ww 16 30 b 2 24 ohms 4 6 6hms 50](https://media.kunduz.com/media/sug-question-candidate/20200912040015744923-1348182.jpg?w=256)
Physics
Current ElectricityIn the figure the numerical values denote 4 resistances in SI units The total resistance of the circuit between a b will be ww 1 12 ohms 3 15 ohms www 3 ww 20 wwww 15 ww 20 www ww 16 30 b 2 24 ohms 4 6 6hms 50
![3 Resistances of b manner shown in adjoining figure With the current 0 5 ampere as shown in figure the potential difference Vp Vo is P 0 5 A 692 wwww A V C V 3 60 www 60 N A 3 6 V C 3 0 V The potential difference B in figure will be 502 592 ww wwwwww A 502 652 692 wwwww 652 wwwww B 6 0 V D 7 2 V between the points A and 592 2V ve 552 B 502 B V a D 2V](https://media.kunduz.com/media/sug-question-candidate/20200709052650879762-1856352.jpg?w=256)
Physics
Current Electricity3 Resistances of b manner shown in adjoining figure With the current 0 5 ampere as shown in figure the potential difference Vp Vo is P 0 5 A 692 wwww A V C V 3 60 www 60 N A 3 6 V C 3 0 V The potential difference B in figure will be 502 592 ww wwwwww A 502 652 692 wwwww 652 wwwww B 6 0 V D 7 2 V between the points A and 592 2V ve 552 B 502 B V a D 2V
![1 The dimensionally correct expression for resistance R among the following is P electric power electric current t tim V voltage and E electric energy 1 R PI OBEYGR 2 R E 1 t](https://media.kunduz.com/media/sug-question-candidate/20200622144519012097-1848890.jpg?w=256)
Physics
Current Electricity1 The dimensionally correct expression for resistance R among the following is P electric power electric current t tim V voltage and E electric energy 1 R PI OBEYGR 2 R E 1 t
![133 Which of the following graph represents the variation of resistivity p with temperature T for copper 1 P 2 P 3 P 4 P 2 T T T TS 12 27 1227X1 lood 12 27x1 107](https://media.kunduz.com/media/sug-question-candidate/20200920150502808107-2090950.jpg?w=256)
Physics
Current Electricity133 Which of the following graph represents the variation of resistivity p with temperature T for copper 1 P 2 P 3 P 4 P 2 T T T TS 12 27 1227X1 lood 12 27x1 107
![Figure shows part of a circuit Calculate the power dissipated in 3 2 resistance What is the potential difference Vc VB C 192 12 V 5 A D 29 322 3 V E 422 2A 6 A 622 B](https://media.kunduz.com/media/sug-question-candidate/20200902030407012135-1877368.jpg?w=256)
Physics
Current ElectricityFigure shows part of a circuit Calculate the power dissipated in 3 2 resistance What is the potential difference Vc VB C 192 12 V 5 A D 29 322 3 V E 422 2A 6 A 622 B
![In the given circuit reading of ideal voltmeter is A 2 V B 4 V C 6 V D 8 V 8 V ww 20 40 20 40 20](https://media.kunduz.com/media/sug-question-candidate/20200907161814862691-1896207.jpg?w=256)
Physics
Current ElectricityIn the given circuit reading of ideal voltmeter is A 2 V B 4 V C 6 V D 8 V 8 V ww 20 40 20 40 20
![106 In given figure the potentiometer wire AB has a resistance of 5 2 and length 10 m The balancing length AM for the emf of 0 4 V is a 0 4 m A 5 V 11 0 4 V R 4592 ww O M b 4 m B](https://media.kunduz.com/media/sug-question-candidate/20200811104949377850-1909794.jpg?w=256)
Physics
Current Electricity106 In given figure the potentiometer wire AB has a resistance of 5 2 and length 10 m The balancing length AM for the emf of 0 4 V is a 0 4 m A 5 V 11 0 4 V R 4592 ww O M b 4 m B
![ors of 65 Equivalent resistance of the network between points A and B is 2 are arranged in a square as shown A M E LLOR So 3](https://media.kunduz.com/media/sug-question-candidate/20200914065958265243-2042288.jpg?w=256)
Physics
Current Electricityors of 65 Equivalent resistance of the network between points A and B is 2 are arranged in a square as shown A M E LLOR So 3
![At what value of resistance x in the circuit shown will the total resistance between points A and B be independent of the number of cells A R www www www w 2R 1 R 3 1 R www 2R 2R R www R www www 2R 2 R www X](https://media.kunduz.com/media/sug-question-candidate/20200917060619361333-1903025.jpg?w=256)
Physics
Current ElectricityAt what value of resistance x in the circuit shown will the total resistance between points A and B be independent of the number of cells A R www www www w 2R 1 R 3 1 R www 2R 2R R www R www www 2R 2 R www X
![8 The variation of terminal potential difference V with current flowing through a cell is as shown 3 V V in Volt cell are 6 A 1 in A The emf and internal resistance of the Vr Tr](https://media.kunduz.com/media/sug-question-candidate/20200723142347084052-1889895.jpg?w=256)
Physics
Current Electricity8 The variation of terminal potential difference V with current flowing through a cell is as shown 3 V V in Volt cell are 6 A 1 in A The emf and internal resistance of the Vr Tr