Physics question and answers for May 20, 2024
- Q A parallel beam of monochromatic light of wavelength 663 nm is incident on a totally reflecting plane mirror The angle of incidence is 60 and the number of photons striking...
- Q A small block of mass m is placed on a plank of equal mass m All the surfaces are smooth The block is pushed and given an initial speed of...
- Q A thin and uniform rod of mass M and length L is held vertical on a floor with large friction The rod is released from rest so that it falls...
- Q Four identical particles each of mass 1 kg are arranged at the corners of a square of side length 2 2 m 13 1 If one of the particles is...
- Q 37 A man of mass m moves with a constant speed on a plank of mass M and length 1 kept initially at rest on a frictionless horizontal surface from...
- Q Six identical balls are lined in a straight groove made on a horizontal frictionless surface Two similar balls each moving with a velocity v collide elastically with the row of...
- Q A photoelectric material having work function is illuminated with light of wavelength gel No The fastest photoelectron has a de Broglie wavelength 2d A change in wavelength of the incident...
- Q MCQ Single Correct 1 O Consider regular polygons with number of sides n 3 4 5 as shown in the figure The center of mass of all the polygons is...
- Q If the resultant of all the external forces acting on a system of particles is zero then from an inertial frame one can surely say that 2009 A linear momentum...
- Q 50 In the given arrangement what can be th maximum mass of block C so that blocks A and B move together um 1 1 4 m 3 1 11...
- Q A thin disc of non uniform mass distribution is shown in x y plane Surface mass density of disc varies according to relation Gosine where do is a positive constant...
- Q A large heavy sphere and a small light sphere are dropped Comprehension I together onto a flat surface from a height h The radius of spheres is much smaller than...
- Q 1 In the rectangular lamina shown in the fig AB BC 2 The moment of inertia of the lamina is minimum along the axis passing through A E D FF...
- Q 1 A circular plate of diameter d is kept in contact with a square plate of edge d as shown in figure The density of the material and the thickness...
- Q A ball of mass m is released from A inside a smooth wedge of mass m as shown in Fig 8 269 What is the speed of the wedge when...
- Q 31 As per this diagram a point charge q is placed at the origin O Work done in taking another point charge Q from the point A co ordinates 0...
- Q System of Particles and Rotational Motion 67 Two masses m and 2m are at a distance and if they revolve due to their mutual attraction then the ratio of their...
- Q In the arrangement shown in figure wedge of mas M moves towards left with an acceleration a A surfaces are smooth The acceleration of mass relative to wedge is 1...
- Q The centre of mass of rigid body always lie inside the body Is this statement true or false
- Q A block A of mass 2m is placed on another block B of mass 4m which in turn is placed on a fixed table The two blocks have a same...
- Q A bomb of mass 3 0 kg at rest explodes in a into two pieces of masses 2 0 kg and 1 0 kg The smaller mass goes at a...
- Q A cone and sphere are placed together as shown in fig Density of material of cone is 1 18 times that of sphere The position of centre of mass on...
- Q Two equal vectors have a resultant to eithe side what is the angle between them A 45 C 90 B 60 D 120
- Q A tennis ball is dropped on a horizontal smooth surfa It bounces back to its original position after hitting the surface The force on the ball during the collision is...
- Q Dall of mass m is released from the top of an inclined plane of inclination 8 as shown It strikes a rigid 3 from top elastically Impulse imparted to ball...
- Q A body of mass M hits normally a rigid wall with velocity V and bounces back with the same velocity The impulse experienced by the body is a MV b...
- Q A body moving with speed v in space explodes into two piece of masses in the ratio 1 3 If the smaller piece comes to rest the speed of the...
- Q Two particles having masses 1 kg and 7 k respectively attract each other Initially they are a rest and infinite separation The velocity c approach of the particles are at...
- Q Two uniform hemispheres A and B are concentrically fixed to each other and the composite body thus formed is placed on a horizontal floor as shown Masses of the hemisphere...
- Q Calculate the strength of the magnetic field at a distance of 20 cm from a pole of strength 40 Am in air Find the induction at the same point
- Q 2 A person taking in his hands spheres each of mass 2 kg is standing on a table revolving with an angular velocity of 10 rad s His arms are...
- Q 5 A cubical block of side a is moving with velocity v on a horizontal smooth plane as shown it hits a small ridge at point O The angular speed...
- Q A rod of length L is placed along the x axis between x 0 and x L The linear density mass length of the rod varies with the distance x...
- Q In a vertical plane inside a smooth hollow thin tube a block of same mass as that of tube is released as shown in figure When it is slightly disturbed...
- Q the false statement 1 In elastic collision KE is not conserved during the collision 2 The coefficient of restitution for a collision between two steel balls lies between 0 and...
- Q 32 In the arrangement shown the pendulum on the to collide with other pendulum which is at rest A left is pulled aside It is then released and allowed perfectly...
- Q Find moment of inertia of a uniform annular disc of mass 100 g having inner radius 10 cm and outer radius 20 cm about an axis passing through its centre...
- Q Two bodies of same mass tied with an inelastic string of length lie together One of them is projected vertically upwards with velocity 6ge Find the maximum height up to...
- Q Two particles m 1 2 kg and m 3 kg have position m2 vectors 1 ti 2t2j 2 tk where r2 i 2t j 5k position vectors are in metres...
- Q B 32 J C zero D can t be obtained A body of mass 2 kg is kept on a rough horizontal surface as shown in the figure Find the...
- Q Mass of the pulley is m radius is R Assume pulley to be disc Block of mass m is released from the position shown String is massless inextensible There is...
- Q ET A metre stick is placed vertically at the origin on a frictionless surface A gentle push in x direction is given to the top most point of the rod...
- Q A railway flat car has an artillery gun installed on it The combined system has a mass M and moves with a velocity vo The barrel of the gun makes...
- Q 5 The x y coordinates of the centre of mass of a uniform L shaped lamina of mass 3 kg is a 516 5 m m 6 c m b...
- Q Three identical balls ball I ball II and ball III are placed on a smooth floor on a straight line at the separation of 10 m between balls as shown...
- Q A circle and a square wire frame each of mass m are arranged as shown in the diagram The diameter of the circle and the edge of the square are...
- Q 16 A black hole is an object whose gravitational field is so strong that even light cannot escape from it To what approximate radius would earth mass 5 98 x...
- Q 4 The co ordinates of centre of mass of particles of mass 10 20 and 30 gm are 1 1 1 cm The position co ordinates of mass 40 gm...
- Q 1 0 5 3 0 25 4 0 75 A ball collides with an fixed inclined plan of inclination 0 after falling through distance h If it moves horizontally just...
- Q 3 9 m s 4 zero 3 A ball of mass M moving with speed V undergoes a head on elastic collision with a ball of mass nM initially at...
- Q A bowler throws a ball horizontally along east direction with speed of 144 km hr The batsman the ball such that it deviates from its initial direction of motion by...
- Q A 50 kg boy runs at a speed of 10 m s and jumps onto a cart as shown in the figure The cart s initially at rest If the...
- Q Three particles of masses 0 5 kg 1 0 kg and 1 5 kg are laced at the three corners of a right angled triangle of ides 3 0 cm...
- Q 27 21 1 A block of mass 0 50 kg is moving with a speed of 2 00 ms on a smooth surface It strikes another mass of 1 00...
- Q There is a thin uniform disc of radius R and mass per unit area o in which a hole of radius R 2 has been cut out as shown in...
- Q 4 A shell of mass 200 gm is ejected from a gun of mass 4 kg by an explosion that generates 1 05 kJ of energy The initial velocity of...
- Q H A uniform symmetric solid pyramid with hexagonal base has height H Height of com from base is X Find x
- Q E 32 As per this diagram a point charge q is pla the origin O Work done in taking another point charge Q from the point A Coordinates 0 a...
- Q Five homogeneous bricks each of length L are arranged as shown in by L 5 Find the x coordinate of the centre of mass relative to the origin O shown...
- Q A projectile is fired from ground with velocity u at an angle 0 with horizontal At the highest point of its trajectory it splits up into two fragments of equal...
- Q ts choose the one best describes the two Statements Statement I A point particle of mass m moving with speed v collides with stationary point particle of mass then f...
- Q Xp 2 Two light rigid rods each of length I are connected by a hinged joint A particle A of mass m is attached at the joint and two thin...
- Q 2 An impulse J is applied on a ring of mass m along a line passing through its centre O The ring is placed on a rough horizontal surface The...
- Q Look at the drawing given in the figure which has been drawn with ink of uniform line thickness The mass of ink used to draw each of the two inner...
- Q A small pendulum bob is released from rest with the string being horizontal The bob swings and collides elastically with another ball B of same mass Ball B is kept...
- Q The centre of mass of triangle shown in figure has coordinates 3 x h h 1 x 2 Y 2 elm y b W 5 N O b X b...
- Q Two spheres of same mass m are moving in opposite directions with speed v and 2 They 1 collide with coefficient of restitution e Loss 2 of kinetic energy of...
- Q SS A trolley child of total mass 200 kg is moving with a uniform speed of 36 km h on a frictionless track The child of mass 20 kg starts...
- Q 2 A hoop of radius r and mass m rotating with an angular velocity is placed on a rough horizontal surface The initial velocity of the centre of the hoop...
- Q 4 A firehose squirts 10 kg s of water against a flat plate The velocity of stream is 10 m s If water comes to rest against the plate find...
- Q In the HCI molecule the separation between the nuclei of the two atoms is about 1 27 1 10 m The approximate location of the centre of mass of the...
- Q An explosion breaks a rock into three parts i horizontal plane Two of them go off at right ang to each other the first part of mass 1 kg mo...
- Q A proton of mass m collides with a heavy particle After collision proton bounces back with of its 4 9 initial kinetic energy Collision is perfectly elastic Find mass of...
- Q A horizontal ring of radius r spins about its vertical axis with an angular velocity w in a uniform vertica magnetic field of magnitude B The emf induced in the...
- Q 22 Two particles A and B of equal mass M are moving with the same speed v as shown in the figure They collide completely inelastically and move as a...
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