Physics-
General
Easy
Question
Current 
is flowing in conductor shaped as shown in the figure. The radius of the curved part is 
and the length of straight portion is very large. The value of the magnetic field at the centre 
will be
The correct answer is:
So, net magnetic field at the centre
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Methanol cannot be dried with anhydrous 
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A block of mass m is being pulled up the rough incline by an agent delivering constant power P. The coefficient of friction between the block and the incline is 
. The maximum speed of the block during the course of ascent is
A block of mass m is being pulled up the rough incline by an agent delivering constant power P. The coefficient of friction between the block and the incline is . The maximum speed of the block during the course of ascent is
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Two identical blocks A and B are placed on two inclined planes as shown in diagram. Neglect air resistance and other friction
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Statements III : Work done by external agent to move block slowly from position B to O is negative
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Read the following statements and choose the correct options. Statements I : Kinetic energy of 'A' on sliding to J will be greater than the kinetic energy of B on falling to M.
Statements II : Acceleration of 'A' will be greater than acceleration of 'B' when both are released to slide on inclined plane.
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physics-General
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For a particle moving on a straight line the variation of acceleration with time is given by the graph as shown. Initially the particle was at rest. Then the corresponding kinetic energy of the particle versus time graph will be
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physics-General
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In the figure the variation of components of acceleration of a particle of mass 1 kg is shown w.r.t. time. The initial velocity of the particle is 
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A collar ‘B’ of mass 2 kg is constrained to move along a horizontal smooth and fixed circular track of radius 5 m. The spring lying in the plane of the circular track and having spring constant 200 N/m is undeformed when the collar is at ‘A’. If the collar starts from rest at ‘B’, the normal reaction exerted by the track on the collar when it passes through ‘A’ is :
A collar ‘B’ of mass 2 kg is constrained to move along a horizontal smooth and fixed circular track of radius 5 m. The spring lying in the plane of the circular track and having spring constant 200 N/m is undeformed when the collar is at ‘A’. If the collar starts from rest at ‘B’, the normal reaction exerted by the track on the collar when it passes through ‘A’ is :
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The blocks A and B shown in the figure have masses 
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An infinitely long straight conductor 
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physics-General
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and 
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The figure shows the cross-section of a long cylindrical conductor of radius 
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The boiling point of ethyl alcohol is much higher than that of dimethyl ether and 
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Two identical bar magnets are fixed with their centres at a distance d apart. A stationary charge 
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Consider a disc rotating in the horizontal plane with a constant angular speed w about its centre O. The disc has a shaded region on one side of the diameter and an unshaded region on the other side as shown in the figure. When the disc is in the orientation as shown, two pebbles P and Q are simultaneously projected at an angle towards R. The velocity of projection is in the y-z plane and is same for both pebbles with respect to the disc. Assume that (i) they land back on the disc before the disc has completed 1/8 rotation, (ii) their range is less than half the disc radius, and (iii) w remains constant throughout. Then
Consider a disc rotating in the horizontal plane with a constant angular speed w about its centre O. The disc has a shaded region on one side of the diameter and an unshaded region on the other side as shown in the figure. When the disc is in the orientation as shown, two pebbles P and Q are simultaneously projected at an angle towards R. The velocity of projection is in the y-z plane and is same for both pebbles with respect to the disc. Assume that (i) they land back on the disc before the disc has completed 1/8 rotation, (ii) their range is less than half the disc radius, and (iii) w remains constant throughout. Then
physics-General
