Physics question and answers for August 17, 2024
- Q a Be b 40 In a full wave rectifier circuit operating from 50 Hz mains frequency the fundamental frequency in the ripple would be a 25 Hz b 50 Hz...
- Q A y ray photon produces an electron positron pair If the rest mass energy of electron is 0 51 Mev and the total kinetic energy of electron positron pair is...
- Q A body A of mass M while falling 01 under gravity breaks into two parts a body B of mass 1 3 M 2 and a body C of mass...
- Q D All the above When the branch of a tree is shaken the ripe fruits get detached from the branch This is ar example of A Newton s first law...
- Q When two tuning forks fork 1 and fork 2 are sounded simultaneously 4 beats per second are heard Now some tape is attached on the prong of the fork 2...
- Q A body of mass m is accelerated uniformly from rest to a speed v in a time T The instantaneous power delivered to the body as a function of time...
- Q 7 A bar magnet has dimensions of 25 cm 10 cm anc 5 cm If length of magnet is 25 cm and its pol strength is 200 x 10 3...
- Q The formula R radius of curvature R approaches infinity Hence becomes zero Substituting this in above R we get formula for the plane surfacesh 0 The distances u and y...
- Q In the circuit shown the current in the 192 resistor is 6V 3 0 a 0 13 A from Q to P c 1 3A from P to Q P...
- Q 13 On closing the switch S the amount of charge flows from A to B is 10 C 10 C A 1 5 C 2 F S 1 F 2...
- Q are ideal 3 2 g ILB ILB ug Block m X X XI I I X X X 1 I Minimum value of mass m of block to pu square...
- Q 27 A sonometer wire is to be divided into three segments having fundamental frequency in the ratic 1 23 the ratio of lengths should be 2 4 3 1 4...
- Q 7 Two boys are left in the middle of a frictionless floor A boy of mass 20 kg gives a blow lasting for one millisecond of 100 kN to the...
- Q In a series resonant LCR circuit the voltage across R is 100 volts and R 1 k2 with C 2uF The resonant frequency w is 200 rad s At resonance...
- Q In a common base mode of a transistor the collector current is 5 488 mA for an emitter current of 5 60 mA The value of the base current amplification...
- Q 3 He has given me a novel 4 I promised him a reward 5 I taught him a lesson
- Q 3 Focal length of magnifiying lens is 5 cm What will be the maximum magnification possible 1 4 3 6 2 5 4 7
- Q A material B has twice the specific resistance of A A circular wire made of B has twice the diameter of a wire made of A then for the two...
- Q into the shape of an inverted U such that the horizontal part has a length 1 15 cm The bent ends of the wire are partially immersed in two pools...
- Q 20 A block B is suspended from a cable that is attached to the block at E wraps around three pulleys and is tied to the back of a truck...
- Q second sphere due to the first Check that the ratio ke G mm is dimensionless Look u of Physical Constants and determine the value of this ra does the ratio...
- Q Three objects A a solid sphere B a thin circular disk and C a circular ring each have the same mass M and radius R They all spin with the...
- Q A motorboat is racing towards north at 36 km h w r t water and the speed of water current in that region is 10 km h towards east The...
- Q 4 When object is at a distance of 30 cm from concave mirror Consider two reflection first one on plane mirror second one on concave mirror The velocity of final...
- Q A Young s double slit experiment uses a monochromati source The shape of the interference fringes formed on screen is a circle c parabola b hyperbola d straight line
- Q The resultant of two vectors of magnitudes 3A and 2A is R If the first vector is doubled then the magnitude of resultant is also doubled The angle between two...
- Q 0 A uniformly charged solid sphere of radius R has potential Vo measured with respect to o on its surface For this sphere the equipotential surfaces with potentials 3V0 5V...
- Q When 5V potential difference is applied across a wire of length 0 1 m the drift speed of electrons is 2 5 10 4 ms If the electron density in...
- Q Four bodies A B C and D are projected from the ground with same speed at angles 39 43 52 and 46 with the horizontal respectively The correct relation for...
- Q 5 The function sin t represents a a periodic but not simple harmonic motion with a peria TC 0 b a periodic but not simple harmonic motion with a peria...
- Q The time taken by a photoelectron to come out after the photon strikes is approximately a 104s c 10 16 g b d 10 10 s 10 1e
- Q Find out the acceleration of the block B in the following systems B 4 a 2m b B 3m
- Q A 20 cm long capillary tube is dipped in water The water rises up to 8 cm If the entire arrangement is put in a freely falling elevator the length...
- Q Two bodies performing have same amplitude and frequency Their phases at a certain instant are as shown in the figure The phase difference between them is x A 10 0...
- Q 2 Two block of masses m and m are connected with the help of a spring of spring constant k initially the spring in its natural length as shown A...
- Q Example 30 1 Two plane mirrors M and M are inclined at angle 0 as shown A ray of light 1 which is parallel to M strikes M and after...
- Q Example 2 The figure shows a cross sectional view of a masonry dam whose length perpendicular to the diagram in 30 m The depth of water behind the dam is...
- Q 17 An elevator is moving upward with an acceleration a It has velocity v at t 0 A man inside the elevator lifts a body of mass m slowly through...
- Q An object is placed 21 cm infront of a concave mirror of radius of curvature 20 cm A glass slab of thickness 3 cm and refractive index 1 5 is...
- Q 1 A charged particle of mass m and charge q is released from rest from position x 0 0 in a uniform electric field Eoj The angular momentum of the...
- Q 10 A 2 25 mm Dipole moment Electric flux The number of circular divisions on the shown screw gauge is 50 It moves 0 5 mm on main scale for...
- Q When a mass is rotating in a plane about a fixed point its angular momentum is directed along 1 the radius 85 2 the tangent to the orbit 3 a...
- Q Figure shows an irregular shaped with AB moving with velocity v as shown Find the emf induced in the wire OB B
- Q 2 A nuclear transformation is denoted by X n a Li Which of the following is the nucleus of element X a Be 10 d B inquit onerating from 50...
- Q A man of mass m climbs on a rope of length L suspended below a balloon of mass M The balloon is stationary with respect to ground If the man...
- Q 35 A gaseous mixture consists of 16 g of helium and 16 g of oxygen The ratio mp a 1 62 of the mixture is Cv b 1 59 c...
- Q 6 The moment of the force F 41 51 6k at 2 0 3 about the point 2 2 2 is given by 1 81 41 7k 2 41 1...
- Q 5 How many electrons may be removed from a body so that it may have a charge of a 1 milli coulomb b 1 micro coulomb h 6 25 x...
- Q A thermocouple is made from two metals Antimony and Bismuth If one junction of the couple is kept hot and the other is kept cold then an electric current will...
- Q A 10 kg solid sphere of radius r 0 8 m is rolling without slipping on a horizontal rough surface with 8 m s The force applied by the right...
- Q A whistle producing sound waves of frequencies 9500 HZ and above is approaching a stationary person with speed v ms The velocity of sound in air is 300 ms If...
- Q Starting with a sample of pure 66 Cu c 7 minutes 8 Zn in 15 minutes The corresponding half life is a 15 minutes b 10 minutes of it decays...
- Q We are given the following atomic masses 238 238 05079 u16 234Th 234 04363 u 2013 4He 4 00260 u gitvilos brit boow The energy released during the alpha decay...
- Q 1 A cell a resistor a key and ammeter are arranged as shown in the circuit diagrams of Figure12 1 The current recorded in the ammeter will be R A...
- Q The period of oscillation of a simple pendulum of length L suspended from the roof of a vehicle which XL then find X moves without friction down on inclined plane...
- Q In a region steady and uniform electric and magnetic fields are present These two fields are parallel to each other A charged particle is released from rest in this region...
- Q An observer looks at a distant tree of height 10 m with a telescope of magnifying power of 20 To the observer the tree appears JEE Mains 2016 1 20...
- Q 10 The angular magnification of telescope is 30 If all the light which passes through objective lens of diameter 80 cm also passes through eye piece lens then find out...
- Q Example 1 2 If 10 electrons move out of a body to another body every second how much time is required to get a total charge of 1 C on...
- Q A light rope fixed at one end of a wooden clamp on the ground passes over a tree branch and hangs on the other side figure 5 W9 It makes...
- Q Section F Collision 1 A particle moving with kinetic energy K makes a head on elastic collision with an identical particl rest Find the maximum elastic potential energy of the...
- Q 3 A microscope is focussed on a mark on of paper and then a slab of glass of thickness cm and refractive index 1 5 is placed over the mark...
- Q A mercury thermometer is placed in a gravity free hall without touching anything As temperature rises mercury expands and ascend in thermometer If height ascend by mercury in thermometer is...
- Q In the given string pulley arrangement all the pulleys and strings are massless and smooth The acceleration of block will be ZUL 901 1 g 4 3 g 2 D...
- Q Focal length of converging combination of two ler is 20 cm The ratio of dispersive power is 2 One of the focal length will be 1 6 cm 2 10...
- Q material and having the same cross section have Three rods made of the same as A been joined as shown in the figure Each rod is of the same length...
- Q An elevator initially at rest supported by a cabl passes over a pulley of radius 0 4 m It is accelerater upwards with 0 6 m s Find number of...
- Q 5 The temperature of inversion of a thermocouple is 620 C and the neutral temperature is 300 C What is the temperature of cold junction AIPMT Prelims 2005 1 20...
- Q 6 Extreme position to half of the amplitude A particle undergoes simple harmonic motion having time period T Find the time taken to complete 318 oscillation TC The displacement of...
- Q a 0 5 Am A substance cools from 75 C to 70 C in T minute from 70 C to 65 C in T minute and f 65 C to...
- Q c 75 C d 0 C 9 A wall has two layers A and B each made of different materials The layer A is 10 cm thick an Bis 20...
- Q Figure shows the kinetic energy K of a simple pendulum versus its angle 0 from the vertical The pendulum bob has mass 0 2 kg If the length of the...
- Q Example 1 3 How much positive and negative charge is there in a cup of water
- Q 28 A solid sphere of mass m and radius R is rotating about its diameter A solid cylinder of the same mass and same radius is also rotating about its...
- Q The equivalent resistance between point A and B is RAR R BR a R b R 4 c 4R d 2R 3
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