Physics Questions

Even number of infinite concentric circular arcs of same angular span 0 carry uniform linear charge densities A and alternatively as shown in figure Their radii are R 2R 3R respectively potential at their common centre is The 3 2 0 In2 41 En 20 Inl 41 E use 1 1A Common Test 8 36 2 0 R 2 R 20 In 2 2n E Telegram 4 None of these 29 No questi tema R 2R 3R 13 1 3 for THE 0 In2 41 E 20 in 1 4 AGRA fangen 2 0 R R 4 20 In 2 2n E 1001CMD302120020 Hindi 07102020

In the circuit shown in figure potential difference between points A and B VA VB is A 5922 www 502 www 592 O 2 V 1 5 V 1 25 V O 1 75 V Yh 2 V www 522 0 592 www www 5 V B www 502

In the circuit shown the heat produced in 20 resistance is 10 cal s then heat produced in 10 resistor is A 222 ww 20 cal s 50 cal s 100 cal s Read More 200 cal s 322 www 10 Q2 www 15 Q ww B

20 A tidal power plant of the simple single basin type has a basin area of 30 x 10 m The tide has a range of 12m The turbine however stops operating when the head on it falls below 3m Calculate the energy generated in one filling process in kilowatt hours if the turbine generator efficiency is 0 73

Tal from a height h upon a fix horizontal plane and rebounds Il e is the coefficie of restitution the total distance travelled befo rebounding has stopped is 1 0 1 8 2 A 1 h 3 1 02 21 8 h 1

SolveLancer Test Consider the statements which of the following is correct SolveLancer Test a S is equal to the wave intensity Where symbol have their usual meaning b Curvature of a Comet Tail is due to the force of gravity e The resonant frequency of water molecules in food items always less than frequency of microwaves 1 d For a capacitor the charging current I and displacement current I can never be equal to each other i

TYPE questions Each question has 4 choices 1 Read More Two small balls having equal positive charge Q each are suspended by two insulating strings of equal length L from a hook fixed to a stand The whole set up is taken in a satellite into space The tension in each string is O o 1 Q 4TE 1 1 Q 4 2L 1 A a

Water falls from a height of 60 m at the rate o 15 kg s to operate a turbine The losses due to frictional forces are 10 of energy How muc power is generated by the turbine g 10 m s2 1 12 3 kW 2 7 0 kW 38 1 kW 4 10 2 kW

9 It is difficult to drag a box of same mass kept in position A than in position B as shown in the picture given below A B 1 It is easier to move a box A than box B with same area of contact 5 kg 10 kg

If A is area of intensity of magnetisation in ferromagnetic material versus magnetising field intensity V is volume of the magnetic sample and n is the frequency of alternating magnetic field then the rate of hysteresis loss in the substance is

Q28 19 g of water at 30 C and 5 g of ice at 20 C are mixed together in a calorimeter What is the final temperature of the mixture Given specific heat of ice 0 5 cal g 0c and latent heat of fusion of ice 80 cal g 9 a 0 c b 5 C c 5 C d 10 C

A uniform ladder of length 5m is placed against the wall in vertical plane as shown in the figure If of friction is the same for both the wall and the floor then minimum value of for it not to coefficient slip is A 1 2 B 1 4 5m 4m 3m C 1 3 D 1 5

A charge q is moved from A to Calong the path ABC as shown in figure The work done in moving charge from A to Cis a B 45 A qEa OqEva 6 qEb qEb 5 b 45 C

An equiconvex lens 3 2 is placed over a plane mirror as indicated in diagram An object placed 12 cm from system such that image and object coincide Now a liquid is poured between mirror and lens and for the same object the image now formed at 24 cm from mirror The refractive index of the liquid poured will be A RAM B 4 12cm O C 2 3 u 3 2 VATH D

Calculate the depth below the surface of sea that a rubber ball should be taken so as to decrease its volume by 0 1 density of sea water 1000 kg m 3 Bulk modulus of rubber 9 108 N m 2 acceleration due to gravity 10 m s 1 9 m 3 180 m 2 18 m 4 90 m

SolveLancer Test A front wheel drive car is moving in a hilly area Then which statement is incorrect The motion of wheels is pure rolling SolveLancer Test a If the car is accelerating up a slope then friction force on rear wheel is in backward direction b If the car is accelerating up a slope then friction force on front wheel is in backward direction c If the car moving up with constant velocity then friction force on front wheel is in forward direction d If the car is moving up with constant velocity the friction force on real wheel is zero

1 ZArak 2 4 Arak 3 Arak 2AE 4 Zero 1000 small water drops each of capacitance C join together to form one large spherical drop The capacitance of bigger sphere is 1 C 2 10 C 3 100 C 4 1000 C For shown situation in steady state condition ratio of charge stored in the first and lost th 25 26 1 2Ark 2 4Arck 3 Arck 1000 unten C 1 C 2 10 C 3 100 C 4 1000 C gefeta feefa ford tranff WE

13 There are two holes each of cross sectional area a on the opposite side of a wide rectangular tank containing a liquid of density p When the liquid flows out of the holes the net force on the tank is h vertical distance between the two holes S2apgh 2 4apgh 4 apgh 3 0 5apgh

1 c ab 3 c ab CRA In the circuit shown below C 10 F C C 20 F and C 40 F If the charge on C is 20 uC then potential difference between X and Y is C 2 c a b C C 1 2 V 2 3 V 3 6 V 4 3 5 V The charge in the 2uF capacitor at steady state is 17 18 1 c ab 3 c ab C 40 FC YONGER THI 1 2 V 4 c 6 C 10 F C C 20 F 20 ctaxam 2 c a b 2 3 V HH 3 6 V Y 4 3 5 V

are Two immiscible filled in a vessel The velocity with which the liquid will emerge out of a narrow hole at the bottom is 6gH 4gH 21 2H PA 0 5 g cc HP 1 0 g cc

5K 4K 1 1 9 2AE k 4K 3K 1 2 Two charged capacitors have their outer plates fixed and inner plates connected by a spring of force constant k The charge on each capacitor is q Find the extension in the spring at equilibrium www 3 smooth 2 4 Ack 3K 2K 1 2K K 2 Ar k Zero 5K 4K 1 1 Telegram ne question paper 1 2 24 rafer fa fastafe uch I fredien fesin get af qt fein forran m 2A k 4K 3K 1 2 www smooth 3K 2K 1 q 4 Ask 3 2K K 2 Ak 4 T

an experiment on the specific heat of a metal a 0 20 kg block of the metal at 150 C is dropped in a copper calorimeter of water equiva 025 kg containing 150 cm of water at 27 C The final temperature is 40 C The specific heat of the metal is A 0 1 cal g C 1 B 0 2 cal g C 0 3 cal g C D 0 4 cal g C mo 10 13 pm mathongo

PART C Physics 41 The optical power of a thin convex glass lens in air is 10D Its optical power when surrounded by air on one side and water on the other side and beam of light is incident from air side Hwater Hglass

0 Find the potential difference across point a and b 10 fa fa fa for in fig Telegram ne questionpaper 3 5 6 The charges on two parallel conner plates 11 C C C 3 6 8 C 4 C C C

Two liquid of densities d d and viscosities 1 and 1 are found to flow through a capillary tube under a constant pressure head at the same mass rate Then the ratio 1 1 d 1 dz d 2 di 3 independent of d d 4 None of thogr

In an experiment to determine the resistance of a galvanometer by half deflection method the circuit shown is used In one set of reading R102 and S4 02 then the resistance of the galvanometer is mathongo mathol A 20 C mathongo athongo mathongo mathong B Q D 7 mathongo mathongo mathongo mathongs 2 13 pm

A glass hemisphere 1 5 has a radius of curvature of 16 cm A small object O is located on its axis halfway between the plane and spheric surface The distance between two images when viewed along the axis from the sides of the hemisphere is mothe O horo mathong mathongo thongo mathongo B D cm cm mathongo mathongo mathon 10 13 pm

4 A glass rod of radius 1 mm is inserted symmetrically into a glass capillary tube with inside radius 2 mm Then the whole arrangement is brought in contact of surface of water Surface tension of water is 7 x 10 2 N m To what height will water rise in capillary 1 0 93 cm 2 1 4 cm 3 2 1 cm 4 6 8 cm

In the circuit shown in Figure the current through 1998S 2 Ma a b c d 9V 30 802 202 www 22 202 the 32 resistor is 0 50 A the 3 2 resistor is 0 25 A the 4 resistor is 0 50 A the 4 Q resistor is 0 25 A 80 20 www 22 40

1 16 2 20 3 4 4 2 15 Positive point charge q is placed at distance 2R from the surface of a metallic shell of radius R The electric field at centre of shell due to induced charge is 2R 1 Zero 3 4 1 9 4R 1 2 41 4 4 1 9R2 q R2 15 1 16 2 20 3 4 4 2 TR N T I T H I THE 2R G H atren 4 xet my l m 9 n qu nH SI d thin ser 1 gaat after O 1 3 41 q 4R 2R q 2 1 9 9R 47 4 4 1 q R

From the following facts i 2X Y 2Y X2 ii 2W Y No reaction iii 2Z X 2X Z Which of the following is true Only one correct answer A B i Ew w Ey Y Ex2 x E Ewa W Ey Y Ez Z E

ALLEN In the circuit if no current flows through the 8 galvanometer when the key K is closed the bridge is balanced The balancing condition for bridge is R R ww 2 4 utu utu R Dipole is placed parallel to the electric field If W 9 w shefe einer enter and a gifera starten the fer fra starten st R R R faga a fagan HAR EN fe fee

A particle of charge q mass m moves in a circle 7 of radius r around an infinitely long line charge on linear charge density 2 Then time period will be 1 T 2 xr 3 T m 2kAq 1 2nr m 2k q n Teat 2 T 4 T q Telegram ne question and there and q 4x m 2k q m 1 2 r 2k q 1 T 2 r 3 T 1 2nr a fer am m 2kAq 2k q 2 T 4 T q 4x m 2k q 1 m 2 r 2kq 1001CH02021200

ALLEN Figure shows two uniformly charged large non 5 conducting sheets having surface charge densities 20 and respectively A B and C are three points E be the electric field at point B then electric field at point A can be given by e 2E 20 0 1 B 2 C 3 3 2 4 3E fe 1 Ef W 00 3E 20 A fera farge fam 03 tener ufgefor Baga B 2 colm 4 3

19 In one experiment of determination of speed of sound in air student records 3 readings as given in table find percentage error in reading 1 330 5 m s 331 0 m s 328 5 m s 0 5 330 5 Reading 1 Reading 2 Reading 3 0 5 100 330 a b 100

2C and 6C two charges are repelling each other 1 with a force of 12N If each charge is given 2C of charge then the value of the force will be 1 125 Attractive 2 4N Repulsive 4 Zero 3 8 N Repulsive 2 6C N V 12 fenf 2C fear and 36 1 125 3 3 8 N a 2 4N uffi 4

33 A small drop of water falls from rest through a large height h in air the final velocity is IS Proportional to h 2 Proportional to h 3 Inversely proportional to h MPYAY Almost independent of h

A car weighs 1800 kg The distance between its front axle and back axle is 1 8 m Its centre of gravity is 1 05 m behind front axle The force exerted by level ground on front wheels is g 10 ms 2 NCERT Pg 178 1 7500 N 2 6500 N 3 9500 N 4 1800 N

2E 1 E 2 3 4 3 An electron enter with velocity 4 x 107 m s in the 6 electric field of 3200 volt meter perpendicular to t and it covers 0 10 meter distance The electron 3E 2 will be deflected by 1 1 76 mm 3 176 mm 2 17 6 mm 4 0 176 mm 3 3 4 3 4 x 10 m s 3200 ter forge 0 10 metre 1 1 76 mm 3 176 mm falfafura 2 17 6 mm 4 0 176 mm

3 8 N Repulsive 4 Zero R Electric field due to a non conducting sphere at 2 is same as some extemal point r r R Find the ratio of electric potential w r t infinity at internal and external point R is radius of sphere Qis charge on it 47 16 Two large conducting plates having surface 3 47 32 1 31 32 2 4 49 16 3 8 N ff stance feera fanfarr r R a far farga fava w r t infinity R Q 1 47 32 R 2 4 2 47 49 16 16 str faga s an dical are ser ve ara 3 31 32 4

the circuit below the time What is the current in the 302 resistor the moment immediately after the switch is opened The capacitor in the figure has capacitance of 9F 00 O 1 3 A O 2 3 A O 0 5 A 01 A 9V O 0 33 A 62 WWW S WH 352 65

2 0 5 3 0 8 4 1 0 An inductor 20 mH a capacitor 50 F and a resistor 40 are connected in series across a source of emf V 10sin340t The power loss in A C circuit is NEET 2016 1 0 89 W 2 0 51 W 3 0 67 W 4 0 76 W source are all connec removed from the cir between the voltage If instead C phase difference the circuit is 1 1 imited Reads Office Askash Tower 8 Pusa

8 A Liquid in a cylindrical vessel of radius 0 05 meter is rotated along with the vessel about its axis with a speed of 4 radian sec The rise in liquid level will be g 10 m sec 1 0 002 M 2 0 01 M 3 0 2 M 4 0 1 M 8

16 Two large conducting plates having surface 3 charge densities G and respectively are fixed d distance apart A small test charge q of mass m is attached to two identical springs as shown in the adjacent figure The charge q is now released from rest with springs in natural length Then q will neglect gravity 0 TOWY km k THIE d B 1 perform SHM with angular frequency Telegram ne questionpaper 9 2 perform SHM with amplitude 2k m 3 not perform SHM but will have a periodic motion 4 remain stationary fram fe fanger tr 0 AL a farmer 9 mor TAIT kmk d 9 far i araferen B 1 Red fantom ferred vita nafa 2 tom foren ara 3 4 FI m 81 2k siera fat

The magnitude of electric field due to a uniform sphere of charge of radius R at distance 2R from its centre is equal to that at distance x from the centre where x 2R The value of x is R 2 3R 4 R4

1 10 2 20V 3 30V 4 15V In the combination shown in figure find the charge on the 4 F capacitor 1 30 C 3 24 C HH 13 F 41 se 1 IA Common Test 5 36 10V 1 F HH HE SUF 2 2 5 C 4 10 C 3 30V 20 fuff and t 1 30 C 3 24 C fery WHE HH HH 3pF 4 ISV 10V HH 5 F 2 2 5 C 4 10 C 1001CMD302120 Hindi 07102

A block of mass m attached to one end of the vertical spring produces extension x If the block is pulled and released the periodic time of oscillation is A B C 2 T D 2x g 2 T 2 T 2 T 5 0 XI 6 0 X 2g X

17 m W math 09 NTA Test 09 Numerical There is a crater of depth on the surface of the moon where R is the radius of the moon A ball is projected vertically upwards from the crater with a velocity which is equal to the escape velocity from the surface of the moon If the R 100 thongo mathongo mathongo e mathoaximum height attained by the particle is close to nR where n is an integer then find the value of n honge mothongo

ALLEN Three concentric metallic shells A B and C of radil a b and c a b c have surface charge densities o o a respectively If the shells A and Care at the same potential then the relation between the radii a b and c is 1 c ab 2 c a b 3 c ab 4 c b In the circuit shown below C 10uF C C 20uF a b c a b c siatif a ba cft 1 c ab 3 c ab fufa A BR c for fram A Cfara fr 2 c a b 4 c b C 10uF C C 20uF F

The refractive indices of flint glass for red yellow and violet light are 1 613 1 620 and 1 632 respectively What is dispersive power of flint glass 0 031 0 23 0 016