Current Electricity Questions and Answers
![In the given network if an ideal battery is connected between points A and B a current i 5 6A flows through the battery If the same battery is connected between points B and C a current 1 10 5A flows through the battery The value of 10 R R lifference between A and B is D A R 2 www R www B R](https://media.kunduz.com/media/sug-question-candidate/20200629045706191140-1339674.jpg?w=256)
Physics
Current ElectricityIn the given network if an ideal battery is connected between points A and B a current i 5 6A flows through the battery If the same battery is connected between points B and C a current 1 10 5A flows through the battery The value of 10 R R lifference between A and B is D A R 2 www R www B R
![ob 3 7 battery of 10 volt is connected to a resistance of 20 ohm through a variable resistance R The amount o charge which has passed in the circuit in 4 minutes if the variable resistance R is increased at the rate of ohm min is 1 120 coulomb 120 loge 2 dq V dt R dq dR V dR dt R 1 q 12 V coulomb dq 12 V 40 dR R dR R 12 V log 40 log 20 20 12 x 10 x log 2 B 120 log 2 coulomb 60 D loge 2 coulomb](https://media.kunduz.com/media/sug-question-candidate/20200619063111899357-693813.jpg?w=256)
Physics
Current Electricityob 3 7 battery of 10 volt is connected to a resistance of 20 ohm through a variable resistance R The amount o charge which has passed in the circuit in 4 minutes if the variable resistance R is increased at the rate of ohm min is 1 120 coulomb 120 loge 2 dq V dt R dq dR V dR dt R 1 q 12 V coulomb dq 12 V 40 dR R dR R 12 V log 40 log 20 20 12 x 10 x log 2 B 120 log 2 coulomb 60 D loge 2 coulomb
![When 10 4 electrons are removed from a neutral metal sphere the charge on the sphere becomes a 16 C b 16 C c 32 C d 32 C ith sill it acquires a positive charge because](https://media.kunduz.com/media/sug-question-candidate/20200717095856335699-1237494.jpg?w=256)
Physics
Current ElectricityWhen 10 4 electrons are removed from a neutral metal sphere the charge on the sphere becomes a 16 C b 16 C c 32 C d 32 C ith sill it acquires a positive charge because
![If two bulbs of power 60 W and 100 W respectively each rated 110 V are connected in series with the suppl of 220 V then 1 60 W bulb will fuse 2 100 W bulb will fuse 3 Both bulbs will fuse 4 Bulbs will not fuse trio bulbo whose resistances are in the ratio 1 2 are connected in series to a constant voltage sour](https://media.kunduz.com/media/sug-question-candidate/20200613083019651040-1807693.jpg?w=256)
Physics
Current ElectricityIf two bulbs of power 60 W and 100 W respectively each rated 110 V are connected in series with the suppl of 220 V then 1 60 W bulb will fuse 2 100 W bulb will fuse 3 Both bulbs will fuse 4 Bulbs will not fuse trio bulbo whose resistances are in the ratio 1 2 are connected in series to a constant voltage sour
![a 1 5 A c 1 0 A 37 In the circuit shown below each resistance is R The current I is 15 7R a b c d b 1 5 A d 1 0 A 7V 15R 7 R 15V R Vo A www ww R ww B ww R E D R www R R www www R C](https://media.kunduz.com/media/sug-question-candidate/20200619121726730644-1748351.jpg?w=256)
Physics
Current Electricitya 1 5 A c 1 0 A 37 In the circuit shown below each resistance is R The current I is 15 7R a b c d b 1 5 A d 1 0 A 7V 15R 7 R 15V R Vo A www ww R ww B ww R E D R www R R www www R C
![An ammeter with a scale ranging from 0 to 15 mA has a resistance of 5 2 How should the instrument be connected together with a resistor and with what resistance to measure a a current from 0 to 0 15 A b a potential difference from 0 to 150 V](https://media.kunduz.com/media/sug-question-candidate/20200618201803039174-1824159.jpg?w=256)
Physics
Current ElectricityAn ammeter with a scale ranging from 0 to 15 mA has a resistance of 5 2 How should the instrument be connected together with a resistor and with what resistance to measure a a current from 0 to 0 15 A b a potential difference from 0 to 150 V
![A particle with charge q and mass mis projected with velocity v in opposite direction of a uniform electric field E as shown in figure in a gravity free space After what time the velocity will become v 1 2qE q S v 2 mv qE V 0](https://media.kunduz.com/media/sug-question-candidate/20200715055214989864-1881775.jpg?w=256)
Physics
Current ElectricityA particle with charge q and mass mis projected with velocity v in opposite direction of a uniform electric field E as shown in figure in a gravity free space After what time the velocity will become v 1 2qE q S v 2 mv qE V 0
![A current i in a coil varies with time t according to the graph shown in figure Which of the following graph shows the induced emf in the coil with time tv E dd at 2 I 1 do F dF R](https://media.kunduz.com/media/sug-question-candidate/20200619171716792928-1650131.jpg?w=256)
Physics
Current ElectricityA current i in a coil varies with time t according to the graph shown in figure Which of the following graph shows the induced emf in the coil with time tv E dd at 2 I 1 do F dF R
![Which of the following charge is not possible a 1 6 10 8 C b 1 6 10 9 C 1 6 10 2 C d None of these](https://media.kunduz.com/media/sug-question-candidate/20200717095928432203-1237494.jpg?w=256)
Physics
Current ElectricityWhich of the following charge is not possible a 1 6 10 8 C b 1 6 10 9 C 1 6 10 2 C d None of these
![Equivalent resistance between A and B IS each connecting arm has resistance r A 7r 1 15 3r 3 B 2 4 8r 15 16r](https://media.kunduz.com/media/sug-question-candidate/20200714051239817041-1835984.jpg?w=256)
Physics
Current ElectricityEquivalent resistance between A and B IS each connecting arm has resistance r A 7r 1 15 3r 3 B 2 4 8r 15 16r
![In the given circuit determine current through branch having indicated resistor R Given R R 422 R R R 22 E 5 V 10 V Conducting wire www R R ww e R www e R R Conducting wire](https://media.kunduz.com/media/sug-question-candidate/20200629070022012959-1172721.jpg?w=256)
Physics
Current ElectricityIn the given circuit determine current through branch having indicated resistor R Given R R 422 R R R 22 E 5 V 10 V Conducting wire www R R ww e R www e R R Conducting wire
![1 5 0 192 19 W ww 2 30 3V A B 252 202 3 4V Find potential difference between point A B 1 3 5 V 2 3V 3 4V 4 5V](https://media.kunduz.com/media/sug-question-candidate/20200628055201725375-1729481.jpg?w=256)
Physics
Current Electricity1 5 0 192 19 W ww 2 30 3V A B 252 202 3 4V Find potential difference between point A B 1 3 5 V 2 3V 3 4V 4 5V
![18 Current Electricity 7 In the circuit shown in figure find potential difference across resistor R Tho 200 www Ato 26 bolos 16 totale 0 5 A 3 V T www 292 www R 222 I www 222 relle 1 6 V 6 V www 222](https://media.kunduz.com/media/sug-question-candidate/20200707084243543053-1874726.jpg?w=256)
Physics
Current Electricity18 Current Electricity 7 In the circuit shown in figure find potential difference across resistor R Tho 200 www Ato 26 bolos 16 totale 0 5 A 3 V T www 292 www R 222 I www 222 relle 1 6 V 6 V www 222
![50 A cell can be balanced against 110 cm and 100cm of potentiometer wire respectively with and without being short circuited through a resistance of 100 Its internal resistance is 1 2 0ohm 3 1 0ohm 2 zero 4 0 5ohm](https://media.kunduz.com/media/sug-question-candidate/20200716074336665277-1391377.jpg?w=256)
Physics
Current Electricity50 A cell can be balanced against 110 cm and 100cm of potentiometer wire respectively with and without being short circuited through a resistance of 100 Its internal resistance is 1 2 0ohm 3 1 0ohm 2 zero 4 0 5ohm
![3 75 x 1019 8 An electric iron draws a current of 1 A when voltage is 100 V Calculate the amount of charge flowing through it in two hours If voltage is now changed to 400 V will it make any difference to the current flowing](https://media.kunduz.com/media/sug-question-candidate/20200615102536286389-693813.jpg?w=256)
Physics
Current Electricity3 75 x 1019 8 An electric iron draws a current of 1 A when voltage is 100 V Calculate the amount of charge flowing through it in two hours If voltage is now changed to 400 V will it make any difference to the current flowing
![18 In the circuit all bulbs consume same power If resistance of bulb 1 is 36 Q then resistance of bulb 3 and 4 are 95 B 1 4 Q 12 Q B 95 B m B 362 00 H 2 4 22 99](https://media.kunduz.com/media/sug-question-candidate/20200608183233711500-1787352.jpg?w=256)
Physics
Current Electricity18 In the circuit all bulbs consume same power If resistance of bulb 1 is 36 Q then resistance of bulb 3 and 4 are 95 B 1 4 Q 12 Q B 95 B m B 362 00 H 2 4 22 99
![31 The value of current through 2 2 r sistor is 10 V 1 1 0 A 3 5 0 A 20 V 292 www 12 www 42 wwwww 2 1 5 A 1 21 A](https://media.kunduz.com/media/sug-question-candidate/20200718041549276993-1878980.jpg?w=256)
Physics
Current Electricity31 The value of current through 2 2 r sistor is 10 V 1 1 0 A 3 5 0 A 20 V 292 www 12 www 42 wwwww 2 1 5 A 1 21 A
![Thus the resistivity of copper is 1 7 x 10 8 ohm metre Sample Problem 2 A copper wire has a diameter of 0 5 mm and resistivity of 1 6 10 8 2 m a What will be the length of this wire to make its resistance 10 22 b How much does the resistance change if the diameter is doubled NCERT Book Questi will calculate the area of cross section of the copper wire Here the diame](https://media.kunduz.com/media/sug-question-candidate/20200618151438354811-1839232.jpg?w=256)
Physics
Current ElectricityThus the resistivity of copper is 1 7 x 10 8 ohm metre Sample Problem 2 A copper wire has a diameter of 0 5 mm and resistivity of 1 6 10 8 2 m a What will be the length of this wire to make its resistance 10 22 b How much does the resistance change if the diameter is doubled NCERT Book Questi will calculate the area of cross section of the copper wire Here the diame
![In the circuit the cells E and E have emfs 4V and 8V and internal resistance 0 5 and 192 respectively P D across E and E will be 4V 0 5 A E 4 592 a 4 25V 4 25V c 4 25V 7 5V 8V 1Q HE 3Q 652 B b 3 75V 3 75V d 3 75V 7 5V](https://media.kunduz.com/media/sug-question-candidate/20200624055336807751-1851790.jpg?w=256)
Physics
Current ElectricityIn the circuit the cells E and E have emfs 4V and 8V and internal resistance 0 5 and 192 respectively P D across E and E will be 4V 0 5 A E 4 592 a 4 25V 4 25V c 4 25V 7 5V 8V 1Q HE 3Q 652 B b 3 75V 3 75V d 3 75V 7 5V
![The preparation of LiOH by the electrolysis of a 35 solution of LiCl using a platinum anode led to a current efficiency of 80 What weight of LiOH was formed by the passage of 2 5 A for 4825 s a 1 92 g c 0 96 g b 2 40 g d 0 672 g](https://media.kunduz.com/media/sug-question-candidate/20200615095259357565-1471506.jpg?w=256)
Physics
Current ElectricityThe preparation of LiOH by the electrolysis of a 35 solution of LiCl using a platinum anode led to a current efficiency of 80 What weight of LiOH was formed by the passage of 2 5 A for 4825 s a 1 92 g c 0 96 g b 2 40 g d 0 672 g
![Find equivalent resistance between points A and B Values of resistances in ohms are as shown A 292 B C D 452 30 None of these A 6 3 ww 10 2 ww 2 5 VO www www www 3 wwwww 2 5 www www B 10](https://media.kunduz.com/media/sug-question-candidate/20200620173706582444-1339674.jpg?w=256)
Physics
Current ElectricityFind equivalent resistance between points A and B Values of resistances in ohms are as shown A 292 B C D 452 30 None of these A 6 3 ww 10 2 ww 2 5 VO www www www 3 wwwww 2 5 www www B 10
![3 A 6 V battery is connected to the terminals of a 3 m long wire of uniform thickness and resistance of 100 Q along with another 100 22 resistor in series The difference of potentials between two points on the wire separated by a distance of 50 cm will be 1 2 V 2 3 V 3 1 V 4 0 5 V Hint Half of the potential in 3 V is evenly distributed along the length of the wire](https://media.kunduz.com/media/sug-question-candidate/20200717062717637869-1883456.jpg?w=256)
Physics
Current Electricity3 A 6 V battery is connected to the terminals of a 3 m long wire of uniform thickness and resistance of 100 Q along with another 100 22 resistor in series The difference of potentials between two points on the wire separated by a distance of 50 cm will be 1 2 V 2 3 V 3 1 V 4 0 5 V Hint Half of the potential in 3 V is evenly distributed along the length of the wire
![E are Two cells of emf E and E E connected individually to a potentiometer and their corresponding balancing length are 625 cm and 500 cm then the ratio 1 5 4 2 3 1 3 5 1 4 4 5 E E 2 is](https://media.kunduz.com/media/sug-question-candidate/20200704173204414107-1872388.jpg?w=256)
Physics
Current ElectricityE are Two cells of emf E and E E connected individually to a potentiometer and their corresponding balancing length are 625 cm and 500 cm then the ratio 1 5 4 2 3 1 3 5 1 4 4 5 E E 2 is
![A lightning strike transfers 10 C of charge to the ground in 2 ms Calculate the current during this lightning strike](https://media.kunduz.com/media/sug-question-candidate/20200614121722545793-693813.jpg?w=256)
Physics
Current ElectricityA lightning strike transfers 10 C of charge to the ground in 2 ms Calculate the current during this lightning strike
![A carbon resistor of 47 4 7 k is to be marked with rings of different colours for its identification NEET 2018 The colour code sequence will be 1 Violet Yellow Orange Silver 2 Yellow Violet Orange Silver Violet Gold](https://media.kunduz.com/media/sug-question-candidate/20200712141400010393-1253495.jpg?w=256)
Physics
Current ElectricityA carbon resistor of 47 4 7 k is to be marked with rings of different colours for its identification NEET 2018 The colour code sequence will be 1 Violet Yellow Orange Silver 2 Yellow Violet Orange Silver Violet Gold
![5 A simple potentiometer circuit is shown in the figure The internal resistance of the 4 V battery is negligible AB is a uniform wire of length 100 cm and resistance 2 2 What would be the length AC for zero galvanometer deflection 1 78 5 cm 3 82 5 cm 2 84 5 cm 4 80 5 cm](https://media.kunduz.com/media/sug-question-candidate/20200710071250192246-1638084.jpg?w=256)
Physics
Current Electricity5 A simple potentiometer circuit is shown in the figure The internal resistance of the 4 V battery is negligible AB is a uniform wire of length 100 cm and resistance 2 2 What would be the length AC for zero galvanometer deflection 1 78 5 cm 3 82 5 cm 2 84 5 cm 4 80 5 cm
![Two cylindrical conductors A and B of the same diameter length L and 2L and different materials of resistivity p and 5 p are connected in series with a battery of EMF 28 V If L 25 cm the magnitude of electric field in conductor A is 4 EA N C](https://media.kunduz.com/media/sug-question-candidate/20200629045934990840-1339674.jpg?w=256)
Physics
Current ElectricityTwo cylindrical conductors A and B of the same diameter length L and 2L and different materials of resistivity p and 5 p are connected in series with a battery of EMF 28 V If L 25 cm the magnitude of electric field in conductor A is 4 EA N C
![The current density across a cylindrical conduct radius R varies in magnitude according to the equation wherer is the distance from the central J J 1 5 R axis Thus the current density is a maximum J at that axis r 0 and decreases linearly to zero at the surface r R Calculate the current in terms of J and the conductor s cross sectional area A R](https://media.kunduz.com/media/sug-question-candidate/20200610191010165150-1172721.jpg?w=256)
Physics
Current ElectricityThe current density across a cylindrical conduct radius R varies in magnitude according to the equation wherer is the distance from the central J J 1 5 R axis Thus the current density is a maximum J at that axis r 0 and decreases linearly to zero at the surface r R Calculate the current in terms of J and the conductor s cross sectional area A R
![Example 23 29 A galvanometer gives full scale deflection with 0 006 A current By connecting it to a 4990 2 resistance it can be converted into a 2n 2 resistance it becomes an voltmeter of range 0 30 V If connected to a 249 un 2nd oala 02 Tw ammeter of range 0 1 5 A The value of n is JEE 2](https://media.kunduz.com/media/sug-question-candidate/20200629045136910050-1339674.jpg?w=256)
Physics
Current ElectricityExample 23 29 A galvanometer gives full scale deflection with 0 006 A current By connecting it to a 4990 2 resistance it can be converted into a 2n 2 resistance it becomes an voltmeter of range 0 30 V If connected to a 249 un 2nd oala 02 Tw ammeter of range 0 1 5 A The value of n is JEE 2
![30V 192 til ww 10V ww 19 20 Find current through 20 resistor 1 2A 2 3A 3 3 5A 4](https://media.kunduz.com/media/sug-question-candidate/20200703005552944123-1461613.jpg?w=256)
Physics
Current Electricity30V 192 til ww 10V ww 19 20 Find current through 20 resistor 1 2A 2 3A 3 3 5A 4
![the resistance R in the circuit shown in Figure www random and has a triangular distribution as shown in fr r R 3 V 0 1 r ohms 90 110 constant current i 0 1 A and a constant resistance ro 100 determine the](https://media.kunduz.com/media/sug-question-candidate/20220606064855511306-4562212.jpg?w=256)
Physics
Current Electricitythe resistance R in the circuit shown in Figure www random and has a triangular distribution as shown in fr r R 3 V 0 1 r ohms 90 110 constant current i 0 1 A and a constant resistance ro 100 determine the
![Ifr 122 and E 10V in the network shown in figure Find the current i and current Problem 419 in the branch PQ of the circuit P r TH r r](https://media.kunduz.com/media/sug-question-candidate/20200626152529582215-1854838.jpg?w=256)
Physics
Current ElectricityIfr 122 and E 10V in the network shown in figure Find the current i and current Problem 419 in the branch PQ of the circuit P r TH r r
![in a unbias p n junction 1 high potential is at n side and low potential is at p side 2 high potential is at p side and low potential is at n side 3 p and n both are at same potential 4 undetermined On increasing the reverse bias to a large value in p n junction diode then value of current 1 remains fixed 2 increases slowly 3 decrease slowly 4 suddenly increase](https://media.kunduz.com/media/sug-question-candidate/20200704175901025546-1817483.jpg?w=256)
Physics
Current Electricityin a unbias p n junction 1 high potential is at n side and low potential is at p side 2 high potential is at p side and low potential is at n side 3 p and n both are at same potential 4 undetermined On increasing the reverse bias to a large value in p n junction diode then value of current 1 remains fixed 2 increases slowly 3 decrease slowly 4 suddenly increase
![The resultant resistance value of n resistances each of r ohms and connected in series is X When those n resistances are connected in 12parallel the resultant value is 28 1 X X n 3 n x X 2 n 4 nx](https://media.kunduz.com/media/sug-question-candidate/20200714054517607075-1878980.jpg?w=256)
Physics
Current ElectricityThe resultant resistance value of n resistances each of r ohms and connected in series is X When those n resistances are connected in 12parallel the resultant value is 28 1 X X n 3 n x X 2 n 4 nx
![A house is fitted with certain numbers of 100 W 230 V incandescent lamps The power to the house is fed by a generator producing the power at 240 V The resistance of the wires from the generator to the house is 2 2 Find the maximum number of lamps that can be illuminated so that the voltage across none of the lamps drops below 230 V 10 TT](https://media.kunduz.com/media/sug-question-candidate/20200630191202888408-1172721.jpg?w=256)
Physics
Current ElectricityA house is fitted with certain numbers of 100 W 230 V incandescent lamps The power to the house is fed by a generator producing the power at 240 V The resistance of the wires from the generator to the house is 2 2 Find the maximum number of lamps that can be illuminated so that the voltage across none of the lamps drops below 230 V 10 TT
![Find the potential of J with respect of G 1 40 V 2 60 V 3 20 V 4 30 V 60 V 64 Q 32 02 G](https://media.kunduz.com/media/sug-question-candidate/20200707015700247863-1874623.jpg?w=256)
Physics
Current ElectricityFind the potential of J with respect of G 1 40 V 2 60 V 3 20 V 4 30 V 60 V 64 Q 32 02 G
![Two wires of the same material having lengths in the ratio of 1 2 and diameters in the ratio 2 1 are connected in series with a cell of emf 2 volt and internal resistance 1 ohm What is the ratio of the potential difference across the two wires](https://media.kunduz.com/media/sug-question-candidate/20200709054435922322-1856352.jpg?w=256)
Physics
Current ElectricityTwo wires of the same material having lengths in the ratio of 1 2 and diameters in the ratio 2 1 are connected in series with a cell of emf 2 volt and internal resistance 1 ohm What is the ratio of the potential difference across the two wires
![16 Three resistors are connected as shown in the diagra A 1 amp 522 B ww 1022 wwww wwwww 1592 1 Through the resistor 5 ohm a current of 1 ampere is flowing 1 What is the current through the other two resistors ii What is the p d across AB and across AC iii What is the total resistance SV](https://media.kunduz.com/media/sug-question-candidate/20200609080538839210-1802763.jpg?w=256)
Physics
Current Electricity16 Three resistors are connected as shown in the diagra A 1 amp 522 B ww 1022 wwww wwwww 1592 1 Through the resistor 5 ohm a current of 1 ampere is flowing 1 What is the current through the other two resistors ii What is the p d across AB and across AC iii What is the total resistance SV
![Three 60 W 120V light bulbs are across a 120 V power source If resistance of each bulb does not change with current then find out total power delivered to the three bulbs R 120V](https://media.kunduz.com/media/sug-question-candidate/20200628075333909521-1787352.jpg?w=256)
Physics
Current ElectricityThree 60 W 120V light bulbs are across a 120 V power source If resistance of each bulb does not change with current then find out total power delivered to the three bulbs R 120V
![In the circuit shown below 63 V 59 wwwwwwwww www 42 42 wwwwwwww 3Q 322 22 1 5 2 resistor is 1A 2 52 resistor is 2A 3 22 resistor is 1A](https://media.kunduz.com/media/sug-question-candidate/20200609184312627684-1787352.jpg?w=256)
Physics
Current ElectricityIn the circuit shown below 63 V 59 wwwwwwwww www 42 42 wwwwwwww 3Q 322 22 1 5 2 resistor is 1A 2 52 resistor is 2A 3 22 resistor is 1A
![12 On resistors print 6E7 or 6R7 or 6K7 respectively mean that value of resistances are 1 6 7 2 6 70 6 7k 2 6 7 92 679 6 7k 3 67 2 6 70 67kQ 4 6 7 22 670 67kQ](https://media.kunduz.com/media/sug-question-candidate/20200615031851233252-1638084.jpg?w=256)
Physics
Current Electricity12 On resistors print 6E7 or 6R7 or 6K7 respectively mean that value of resistances are 1 6 7 2 6 70 6 7k 2 6 7 92 679 6 7k 3 67 2 6 70 67kQ 4 6 7 22 670 67kQ
![In the given circuit in figure all batteries have emf and internal resistance negligible All resistors are in ohm Calculate the current in the rightmost 2 2 resistor 10 V 252 202 www 252 10 V 29 www 10 V H 252 www 10 V 2S2 10 V](https://media.kunduz.com/media/sug-question-candidate/20200629065855452136-1172721.jpg?w=256)
Physics
Current ElectricityIn the given circuit in figure all batteries have emf and internal resistance negligible All resistors are in ohm Calculate the current in the rightmost 2 2 resistor 10 V 252 202 www 252 10 V 29 www 10 V H 252 www 10 V 2S2 10 V
![An inductor 20 mH a capacitor 100 uF and a resistor 50 Q are connected in series across a source of emf V 10 sin314t The power loss in the circuit is NEET 2018 1 0 79 W 3 1 13 W 2 0 43 W 4 2 74 W](https://media.kunduz.com/media/sug-question-candidate/20200615074118070311-1650131.jpg?w=256)
Physics
Current ElectricityAn inductor 20 mH a capacitor 100 uF and a resistor 50 Q are connected in series across a source of emf V 10 sin314t The power loss in the circuit is NEET 2018 1 0 79 W 3 1 13 W 2 0 43 W 4 2 74 W
![3 A B B C 4 A B B C SV R 20 BI E 2KQ IKO Find the value of resistance R when VCE 2V VBE 0 7V B 50 1 1000 2 165 4KQ 3 2150 4 100K](https://media.kunduz.com/media/sug-question-candidate/20200704185417593402-1817483.jpg?w=256)
Physics
Current Electricity3 A B B C 4 A B B C SV R 20 BI E 2KQ IKO Find the value of resistance R when VCE 2V VBE 0 7V B 50 1 1000 2 165 4KQ 3 2150 4 100K
![In the arrangment of resistances shown below the effective resistance between points A and B is 50 M 100 www www 100 100 200 W www 1002 B](https://media.kunduz.com/media/sug-question-candidate/20200707015354445423-1874623.jpg?w=256)
Physics
Current ElectricityIn the arrangment of resistances shown below the effective resistance between points A and B is 50 M 100 www www 100 100 200 W www 1002 B
![For a cell of emf 2 V a balance point is obtained for 50 cm of the potentiometer wire If the cell is shunted in parallel by a 2 2 resistor and the balance is obtained across 40 cm of the wire then internal resistance of the cell is R S R 40 3 A 0 25 02 C 0 80 2 20 C d B 0 50 2 D 1 00 2](https://media.kunduz.com/media/sug-question-candidate/20200618202043298338-1824159.jpg?w=256)
Physics
Current ElectricityFor a cell of emf 2 V a balance point is obtained for 50 cm of the potentiometer wire If the cell is shunted in parallel by a 2 2 resistor and the balance is obtained across 40 cm of the wire then internal resistance of the cell is R S R 40 3 A 0 25 02 C 0 80 2 20 C d B 0 50 2 D 1 00 2
![27 The current in the circuit shown is 292 2V www a 1 33 A c 2 00 A 2V 292 Fww A 201 WB JEE 2 Doubt b Zero d 1 00 A](https://media.kunduz.com/media/sug-question-candidate/20200710073833792224-1877476.jpg?w=256)
Physics
Current Electricity27 The current in the circuit shown is 292 2V www a 1 33 A c 2 00 A 2V 292 Fww A 201 WB JEE 2 Doubt b Zero d 1 00 A
![1 An infinitely long straight wire with current I flowing along the positive z axis is located at coordinate P 12 m 5 m Determine the unit vector showing the direction of magnetic field at the origin](https://media.kunduz.com/media/sug-question-candidate/20200707094653755972-1172721.jpg?w=256)
Physics
Current Electricity1 An infinitely long straight wire with current I flowing along the positive z axis is located at coordinate P 12 m 5 m Determine the unit vector showing the direction of magnetic field at the origin
![Equivalent resistance between A and B in the circuit shown is 1 3 8R 15 R 4 A www R www R R www www R ww www R 2 B 15R 8 4 R](https://media.kunduz.com/media/sug-question-candidate/20200623213659872360-1650131.jpg?w=256)
Physics
Current ElectricityEquivalent resistance between A and B in the circuit shown is 1 3 8R 15 R 4 A www R www R R www www R ww www R 2 B 15R 8 4 R
![15 An emf of 15 V is applied in a circuit coil containing resistance The ratio of the 5 H inductance and 10 currents at time t o and t 1s is 1 2 b a e 2 1 c 1 e 2 e e 1 d e](https://media.kunduz.com/media/sug-question-candidate/20200702222956457212-1704047.jpg?w=256)
Physics
Current Electricity15 An emf of 15 V is applied in a circuit coil containing resistance The ratio of the 5 H inductance and 10 currents at time t o and t 1s is 1 2 b a e 2 1 c 1 e 2 e e 1 d e