Physics-
General
Easy
Question
The diagram shows three infinitely long uniform line charges placed on the X, Y and Z axis. The work done in moving a unit positive charge from (1, 1, 1) to (0, 1, 1) is equal to
- None
The correct answer is:
Related Questions to study
physics-
A particle of mass 1 kg & charge 
is projected towards a non conducting fixed spherical shell having the same charge uniformly distributed on its surface. Find the minimum initial velocity of projection required if the particle just grazes the shell.
A particle of mass 1 kg & charge is projected towards a non conducting fixed spherical shell having the same charge uniformly distributed on its surface. Find the minimum initial velocity of projection required if the particle just grazes the shell.
physics-General
physics-
A hemisphere of mass 3m and radius R is free to slide with its base on a smooth horizontal table. A particle of mass m is placed on the top of the hemisphere. If particle is displaced with a negligible velocity, then find the angular velocity of the particle relative to the centre of the hemisphere at an angular displacement q, when velocity of hemisphere is v
A hemisphere of mass 3m and radius R is free to slide with its base on a smooth horizontal table. A particle of mass m is placed on the top of the hemisphere. If particle is displaced with a negligible velocity, then find the angular velocity of the particle relative to the centre of the hemisphere at an angular displacement q, when velocity of hemisphere is v
physics-General
physics-
In the figure shown, the two identical balls of mass M and radius R each, are placed in contact with each other on the frictionless horizontal surface. The third ball of mass M and radius R/2, is coming down vertically and has a velocity = v0 when it simultaneously hits the two balls and itself comes to rest. Then, each of the two bigger balls will move after collision with a speed equal to
In the figure shown, the two identical balls of mass M and radius R each, are placed in contact with each other on the frictionless horizontal surface. The third ball of mass M and radius R/2, is coming down vertically and has a velocity = v0 when it simultaneously hits the two balls and itself comes to rest. Then, each of the two bigger balls will move after collision with a speed equal to
physics-General
physics-
A billiard table whose length and width are as shown in the figure. A ball is placed at point A. At what angle ‘q’ the ball be projected so that after colliding with two walls, the ball will fall in the pocket B. Assume that all collisions are perfectly elastic (neglect friction)
A billiard table whose length and width are as shown in the figure. A ball is placed at point A. At what angle ‘q’ the ball be projected so that after colliding with two walls, the ball will fall in the pocket B. Assume that all collisions are perfectly elastic (neglect friction)
physics-General
physics-
Two men, of masses 60 kg and 80 kg are sitting at the ends of a boat of mass 60 kg and length 4 m. The boat is stationary. If the men now exchange their positions, then
Two men, of masses 60 kg and 80 kg are sitting at the ends of a boat of mass 60 kg and length 4 m. The boat is stationary. If the men now exchange their positions, then
physics-General
physics-
In the figure one fourth part of a uniform disc of radius R is shown. The distance of the centre of mass of this object from centre ‘O’ is
In the figure one fourth part of a uniform disc of radius R is shown. The distance of the centre of mass of this object from centre ‘O’ is
physics-General
physics-
In the figure shown a hole of radius 2 cm is made in a semicircular disc of radius 6p at a distance 8 cm from the centre C of the disc. The distance of the centre of mass of this system from point C is :
In the figure shown a hole of radius 2 cm is made in a semicircular disc of radius 6p at a distance 8 cm from the centre C of the disc. The distance of the centre of mass of this system from point C is :
physics-General
physics-
A uniform chain of length 2L is hanging in equilibrium position, if end B is given a slightly downward displacement the imbalance causes an acceleration. Here pulley is small and smooth & string is inextensible The velocity v of the string when it slips out of the pulley (height of pulley from floor > 2L)
A uniform chain of length 2L is hanging in equilibrium position, if end B is given a slightly downward displacement the imbalance causes an acceleration. Here pulley is small and smooth & string is inextensible The velocity v of the string when it slips out of the pulley (height of pulley from floor > 2L)
physics-General
physics-
A uniform chain of length 2L is hanging in equilibrium position, if end B is given a slightly downward displacement the imbalance causes an acceleration. Here pulley is small and smooth & string is inextensible The acceleration of end B when it has been displaced by distance x, is
A uniform chain of length 2L is hanging in equilibrium position, if end B is given a slightly downward displacement the imbalance causes an acceleration. Here pulley is small and smooth & string is inextensible The acceleration of end B when it has been displaced by distance x, is
physics-General
physics-
From a uniform disc of radius R, an equilateral triangle of side 
R is cut as shown. The new position of centre of mass is :
From a uniform disc of radius R, an equilateral triangle of side R is cut as shown. The new position of centre of mass is :
physics-General
physics-
Two massless string of length 5 m hang from the ceiling very near to each other as shown in the figure. Two balls A and B of masses 0.25 kg and 0.5 kg are attached to the string. The ball A is released from rest at a height 0.45 m as shown in the figure. The collision between two balls is completely elastic. Immediately after the collision, the kinetic energy of ball B is 1 J. The velocity of ball A just after the collision is
Two massless string of length 5 m hang from the ceiling very near to each other as shown in the figure. Two balls A and B of masses 0.25 kg and 0.5 kg are attached to the string. The ball A is released from rest at a height 0.45 m as shown in the figure. The collision between two balls is completely elastic. Immediately after the collision, the kinetic energy of ball B is 1 J. The velocity of ball A just after the collision is
physics-General
physics-
The system of the wedge and the block connected by a massless spring as shown in the figure is released with the spring in its natural length. Friction is absent. maximum elongation in the spring will be
The system of the wedge and the block connected by a massless spring as shown in the figure is released with the spring in its natural length. Friction is absent. maximum elongation in the spring will be
physics-General
physics-
As shown in the figure a body of mass m moving vertically with speed 3 m/s hits a smooth fixed inclined plane and rebounds with a velocity vf in the horizontal direction. If 
of inclined is 30°, the velocity vf will be
As shown in the figure a body of mass m moving vertically with speed 3 m/s hits a smooth fixed inclined plane and rebounds with a velocity vf in the horizontal direction. If of inclined is 30°, the velocity vf will be
physics-General
physics-
Two identical balls A and B are released from the positions shown in figure. They collide elastically on horizontal portion MN. All surfaces are smooth. The ratio of heights attained by A and B after collision will be(Neglect energy loss at M & N)
Two identical balls A and B are released from the positions shown in figure. They collide elastically on horizontal portion MN. All surfaces are smooth. The ratio of heights attained by A and B after collision will be(Neglect energy loss at M & N)
physics-General
physics-
The dumbbell is placed on a frictionless horizontal table. Sphere A is attached to a frictionless pivot so that B can be made to rotate about A with constant angular velocity. If B makes one revolution in period P, the tension in the rod is
The dumbbell is placed on a frictionless horizontal table. Sphere A is attached to a frictionless pivot so that B can be made to rotate about A with constant angular velocity. If B makes one revolution in period P, the tension in the rod is
physics-General
