Physics Questions

4 All of these For what distance is ray optics and approximation when a plane light wave is incident on a slit aperture of width 2mm having wavelength 600nm elegram n 1 6m 2 8m 3 6 7m 4 4m What is the approximate radius of the central bright 10

1 When a bob is suspended by a light string and it is imparted to a horizontal velocity to complete the full circular trajectory in a vertical plane What is the difference in tension between the lowest and highest point of the path 1 mg 315mg 26mg 4 3mg

14 A ball is thrown from the top of a 10m high tower at an angle 600 from the vertical with a velocity 10m s Find the distance from the base of the tower to the point where it falls and the time taken to do so g 10m s 3

30 A coconut from nearby coconut tree suddenly fell down The type of motion executed by the coconut is neglecting air resistance Uniformly accelerated motion Non uniform motion Uniform motion None of these 31 The area under velocity time graph of the motion of coconut gives Initial velocity Final velocity Height of the coconut tree Acceleration due to gravity

if G is universal gravitational constant then ratio of have dimension F is gravitational force aft Gardie gedia Audi 8 Fra O M L M L 2 ML T 2 O IM T 21 urafat

A point charge q is placed inside a neutral conducting shell at a distance 2 7 from the centre of shell Another point charge q2 is placed at a distance 2 R from the centre of shell Choose the CORRECT option s 1 2 Question Type Single Correct Type 3 91 R 2 O 4 R 9 The magnitude of force on q due to induced charges at the inner surface of the conducting shell is zero The magnitude of force on q due to induced charges at the 9192 outer surface of the conducting shell is 8 R The magnitude of force on q2 due to induced charges at the inner surface of the shell is zero The magnitude of force on q2 due to induced charges at the inner 9192

1 MQ 2 An electric cable contains a single copper wire of radius 9 mm It s resistance is 5 Oh This cable is replaced by six insulated copper wires each of radius 3 mm Find t resultant resistance of cable 3

R R earthed concentric sphere of radius R R R The ratio is INGLE CHOICE QUESTIONS Capacity of an isolated sphere of radius R is increased n times when it is enclosed by a A n 1 B n n 1 C 2n n 1 D 2n 1 n 1

2 A left circularly polarized light beam of wavelength 600 nm is incident on a crystal of thickness d and propagates perpendicular to its optic axis The ordinary and extraordinary refractive indices of the crystal are n 1 54 and n 1 55 respectively The emergent light will be right circularly polarized if d is a 120 m b 60 m d 15 m SKE c 30 m

In the circuit shown in figure the equivalent capacitance between the points X and Y is 1 F HH A 2uF 4 F B 3uF X HH 2 F C 4 F Y 4 F D 5 F

Water flows into a container of 1000 L at a rate of 180 3t gal min for an hour where t is measured in minutes Find the amount of water that flows into the pool during the first 20 minutes 1 4000 gal 2 2800 gal 3 4200 gal

10 Figure shows graph between and V for two conductors A A Gust 1 1 1 3 3 1 30 30 B V V 2 1 3 4 1 2 tional Services Limited Regd Office Aakash Tower 8 Pusa Road New Delhi 11000

3 Zero 4 Infinite 08 One of the refracting surfaces of a prism of angle 30 is silvered A ray of light incident at certain angle retraces its path If the refractive index of the material of the prism is 3 the angle of incidence of the ray is 1 30 2 45 4 22 10 3 60

com out Ctrl Minus Tactive muta vi glass An equiconvex lens of focal length 10 cm in air and R I 3 2 is put at a small opening on a tube of length 1m fully filled with liquid of R I 4 3 A concave mirror of radius of curvature 20 cm is cut into two halves M and M and placed at the end of the tube M and M are placed such that their principal axes AB and CD respectively are separated by 1 mm each from the principal axis of the lens A slit S placed in air illuminates the lens with light of frequency 7 5 x 10 4 Hz The light reflected from M and M forms interference pattern on the left end EF of the tube O is an opaque substance to cover the hole left by M and M Width of the fringes on EF is xx 10 um Find the value ofx E a 5m b 3m c 6m a A S 20cm A C O MIB Imm Imm D M

The rigid frame shown in the arrangement consists of 6 identical wires of length L and has linear mass density It is kept on a smooth horizontal table on X Z plane In this region of space an external magnetic field B Bo is applied fed the atas L and 6 4464 art Affaut such Zu GWHA UA A 13 X Z da Ich fach ARRAGA ch Boi fu fa ZE A B D Y Question If there is sufficient friction to prevent slipping and the frame is able to rotate about z axis then the angular velocity with which frame strikes the plane just before the first collision with plane is ufa fhuma ch zicha fay adui qufla 7 am cu 2 31 under gufa cz 44 f 3 d h4 cl ag ch uflu an 841 sm Bud ho da Ugafi cache Ac ugd da Scheldi IB V XL 6IB 5XL 12IB 5XL 5IB B 101 T X

Two identical particles of mass m carry a charge Q each Initially one is at rest on a smooth horizontal plane and the other is projected along the plane directly towards first particle from a large distance with speed v The closed distance of approach be A C 1 Q 4 mv 1 20 2 41 my B D 1 4Q mv 2 4 1 30 2 4 mv

The separation between point object P and the thin convex lens is 40 cm initially at a time t 0 At t 0 the object and lens starts motion with constant velocities 2 cm and 4 cm s respectively towards right Then the speed of image formed by the lens a a time t 10 s is P 2cm s 40 cm f 20 cm 4cm s

An elastic ball of mass m is suspended from a fixed point by an inextensible string A small particle of same mass m moving towards it at an angle of 37 with the vertical hits the ball directly with the velocity vo The coefficient of restitution is The impulse due to tension in the string due to collision is 2mz 17 Find x Refag 37 at an affal I e fat an Atga ter v 2 2mz 17 31

45 If water drops are falling at regular time intervals from ceiling of height H then position of drop from the ceiling is when nth drop falling from the ceiling and rth drop is in its way 1 3 n 1 n r n r 1 In H H 2 4 n r n 1 H n 1 H n r

thickness t 1m at the origin The refractive index of of the transparent slab varies as 1 e Them choose the correct option s SR IIT CO SC Narayana IIT Academy disha ww 1800 419 1828 A dull mind gets bored easily A curious mind expands forever Ifm Jay SRA of the Page No 5 04 07 21 OSR IIT CO SC JEE Adv GTA 16 P II Q P 1 A The equation of the trajectory of light in the slab is x 1 e B The equation of the trajectory of light in the slab is x 1 e C The coordinates 1 the point P at which the light emerges from the slab are D The coordinates of the point P at which the light emerges from the slab are e 1

SolveLancer Test A rectangular coil of area 1 m and resistance 5 placed in a magnetic field B applied perpendicular to the plane of the coil Which of the following is true about the direction and magnitude of the current 20 T s SolveLancer Test dB dt a 4 A Clockwise b 8 A Clockwise c 8 A Anticlockwise d 4 A Anticlockwise B coil

A stone is tossed into a pond creating a circular ripple The radius of the ripple increases by 12 cm s a Write an equation that describes the ripple exactly 3 s after the stone lands in the water Use the origin as the point where the stone lands in the water b A bulrush is located at point 36 48 When will the ripple reach the bulrush

5 Through a straight conducting wire of length 1 m 2 A cur rent is flowing If the wire is placed normal to a uniform magnetic field of strength 10 3 T what will be the mag netic force acting on the wire 2 10 N

1 44 27 Theory and Exercise Book Three point charges q 2 q and 2 q are placed a the vertices of an equilateral triangle of side a The work done by some external force to increase thei separation to 2 a will be A 1 2q a 4 zero B negative 1 3q

Two particles X and Y of equal mass and with unequal positive charges are free to move and are initially far away from each other With Y at rest X begins to move towards it with initial velocity u After a long time finally A X will stop Y will move with velocity u B X and Y will both move with velocities u 2 each C X will stop Y will move with velocity u D both will move with velocities u 2

8 The equation of an equipotential line in an electric field is y 2x then the electric field strength vector at 1 2 may be A 41 3 C 81 41 B 41 81 D 8 41 The electric field in region is given by

The velocity of a rocket in meters per second t second after it was launched is modeled by v t 2 t Then the total distance traveled by the rocket during the first four seconds of its launch is 16 1 3 m 2 32 m 32 m 3 4 16 m 3

A ladder rests against a frictionless vertical wall with its upper end 6m above the ground and the lower end 4m away from the wall The weight of the ladder is 500 N and its C G at 1 3rd distance from the lower end Wall s reaction will be in newton AMU Med 2000 a 111 c 222 b 333 d 129

The inner and outer radii of ring are a and 2a respectively A magnetic field B krt where k is a positive constant r is the radial distance from the axis of the ri and t is the time is existing in the region parallel to the axis of the ring as shown Then choose the correct option s THE NAR 3a A The emf induced in the ring at ris 2 4 2kf 3a 27 B The emf induced in the ring at riskfa C The net induced current in the ring is 9 TA IA GROUP 7 kha D The net induced current in the ring is 6 7 kha

23 The tension in the string connected between blocks is F 10 N 2 kg 7777 Xx 80 N 3 ay 50 N 4 kg 77777 Smooth surface Aakash Educational Services Pvt Ltd Read Officer A 40 N 26 N F 20 N

32 When Raju was travelling with a velocity of 10 m s a cat came in front of his car Suddenly Raju applied the break of his car and car stopped with a retardation of 5 m s2 Find the stopping distance of the car O 5m O 10 m O 15 m 20 m

A bar magnet of pole strength 2A m of 4 cm length placed in uniform field of 5T in such a way that its magnetic equator makes 60 angle with field direction then torque on magnet is Question Type Single Correct Type 1 0 2 N m 20 4 3 N m 3 3 4 N m 4 2 N m

Which of the following relations between the particle number density n and temperature T must hold goc for a gas consisting of non interacting particles to be described by quantum statistics a n T l c n T3 2 1 b n T3 1 d n T1 2 and n T2 can have any value

A system of rods is assembled such that each rod has a length I and cross sectional area S The mode of heat transfer is conduction and the system is in steady state The temperature of the junction A is T and that of C is 2T Then the coefficient of therma conductivity values of the rods is as shown in figure RAMAY A Temperature of the junction B is 1 6T B Temperature of the junction D is 1 4T C The rate of heat flow along BD is D The rate of heat flow along BD is 1 KTS 51 21 KTS 5 1 AYATHE

Ray Optics and Optical Instruments 109 The refractive index of a prism is 2 If the angle of prism is 60 at what angle a ray must be incident on it so that it suffers minimum deviation 1 30 2 45

Q5 In the resistor network shown in Fig below all resistor values are 29 A current of 1A passes from terminal a to terminal b as shown in the figure Calculate the voltage between terminals a and b a 1A www ww www ww www ww www 1A R 252

SolveLancer Test If mass of an electron in an atom of hydrogen increases by 50 then radius of its orbit change by what percent SolveLancer Test a Increases by 70 b Decreases by 50 c Increases by 50 d None of the above

An electron is in a state with spin wave function 312 1 2 in the S representation What is t probability of finding the z component of its spin along the 2 direction a 0 75 b 0 50 c 0 35 d 0 25

Aakash Institute 103 The focal length of a convex lens is 20 cm An object is placed at a distance 30 cm from its focal point The ratio of the size of the real image to the object is 1 2 3 2 20

A dielectric slab fills the space between the plates of a parallel plate capacitor The magnitude of the bound charge on the slab is 75 of the magnitude of the free charge on the plates The capacitance is 480 F and the maximum charge that can be stored on the capacitor is 2408 Emax in C where Ex is the breakdown field in V m max A the dielectric constant for the dielectric slab is 4 B without the dielectric the capacitance of the capacitor would be 360 F C the plate area is 60 m D if the dielectric slab is having the same area as the capacitor plate but the width half that of the capacitor the capacitance would be 192 F

16 From a disc of radius R a concentric circular portion of radius r is cut out so as to leave an annular disc of mass M The moment of inertia of this annular disc about the axis perpendicular to its plane and passing through its centre of gravity is MP PET 2001 a 1 2 M R r c 1 2 M R r 4 b 1 2 M R 2 d 1 2 M R p4

2 10 cm 4 2 cm 3 1 cm An equiconvex lens of focal length f is cut into two equal parts In 1st case it is cut perpendicular to principal axis and in 2nd case it is cut parallel to principal axis Then the focal length of both piece in the two cases will be respectively 1 2f f 11 3 2 2f 2f 4 F

01 An object and a plane mirror are approaching each other with a speed of 2m sec and 1m sec respectively The velocity of image will be 2 2m sec 1 4m sec 3 3m sec 4 6m sec

Find the magnetic field at point O due to semi infinite wire shown in figure ly 1 2 3 4 2 ol 4 R 2 oI 4 R 45 Out of plane of paper Into the plane of paper 2 1 Hol 4 R 2 1 Hol 4 R X Out of plane of paper Into the plane of paper

A galvanometer has a resistance of 20 0 ohm What is the value of shunt resist ance required so that only 1 of the total current pas ses through the galvanometer Also cal culate the effective resistance of the combinatio n

The electric field in region is given by E 4axy z i 2ax z j ax y Z k where a is a positive constant The equation of an equipotential surface will be of the form A z constant x y B z constant xy C z constant x y D None

15 A particle of mass m and charge Q is placed in an electric field E which varies with time t ass E E sinot It will undergo simple harmonic motion of amplitude A C QE2 2 mo QE Vmo 2 B D QEo 2 mo QEo mo

Read the following passage and the answer the following questions Raju was on a long trip He got trapped in a traffic jam During that time he was retrieving his Class 11 Physics memories Let us go along with his memories and try to find the answers of the following five questions 28 The motion of a car during a traffic jam is an example for Uniform motion Non uniform motion Uniformly accelerated motion 4 None of these 29 Raju suddenly thought of his friend Ramu who was a good athelete during school days Ramu completed a running race by running on a circular track by coming back to the starting point without reversing the direction in 68 s What was the displacement covered by Ramu in that race O Tr O 2 r O o

3 Two very long wires carrying a current I of 2 0 A out of the page are at two of the corners of an equilateral triangle as shown in Fig 6 below The sides of the triangle are 1 0 m long Find the direction and magnitude of the magnetic field at P the third corner of the triangle 11 P Fig 6 1 0m

Consider the electrical power is produced by using the sample of Pu in the alpha decay and the mass of the sample of 239 Pu is 10 kg Assume the electrical device works with 60 of efficiency Calculate the power produced in this process a 200 W b 600 W c 55 W d 11 6 W