Physics-
General
Easy
Question
A current of 10 A is passing through a long wire which has semicircular loop of the radius 20 cm as shown in the figure. Magnetic field produced at the centre of the loop is
The correct answer is:
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The unit vectors 
and
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in the following figure
The unit vectors andare as shown below. What will be the magnetic field at in the following figure
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Two long parallel conductors carry currents in opposite directions as shown. One conductor carries a current of 10 A and the distance between the wires is 
Current 
is adjusted, so that the magnetic field at 
is zero. is at a distance of 5 cm to the right of the 10 A current. Value of is
Two long parallel conductors carry currents in opposite directions as shown. One conductor carries a current of 10 A and the distance between the wires is Current is adjusted, so that the magnetic field at is zero. is at a distance of 5 cm to the right of the 10 A current. Value of is
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A bar magnet of length 3 cm has a point 
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A candidate connects a moving coil ammeter and a moving coil voltmeter 
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If the voltmeter reads 20 V and the ammeter reads is
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The magnetic induction at the centre in the figure shown is
The magnetic induction at the centre in the figure shown is
physics-General
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A conducting loop carrying a current is placed in a uniform magnetic field pointing into the plane of the paper as shown. The loop will have a tendency to
A conducting loop carrying a current is placed in a uniform magnetic field pointing into the plane of the paper as shown. The loop will have a tendency to
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A current 
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A current is flowing through the loop. The direction of the current and the shape of the loop are as shown in the figure. The magnetic field at the centre of the loop is times.
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Current is flowing in conductor shaped as shown in the figure. The radius of the curved part is 
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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
physics-General
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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 
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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
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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 II : Acceleration of 'A' will be greater than acceleration of 'B' when both are released to slide on inclined plane.
Statements III : Work done by external agent to move block slowly from position B to O is negative
Two identical blocks A and B are placed on two inclined planes as shown in diagram. Neglect air resistance and other friction
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.
Statements III : Work done by external agent to move block slowly from position B to O is negative
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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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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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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 m/s. The total work done by the resultant force on the particle in time interval from t = 0 to t = 4 seconds 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 :
physics-General
