HARD
12th Odisha Board
IMPORTANT
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A proton and an alpha particle enter a uniform magnetic field with the same velocity. The period of rotation of the α- particle will be

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Important Questions on Magnetic Effect of Electric Current

MEDIUM
12th Odisha Board
IMPORTANT
Two thin long parallel wires separated by a distance b are carrying a current i amp each. The magnitude of the force per unit length exerted by one wire on the other is
MEDIUM
12th Odisha Board
IMPORTANT
A conducting circular loop of radius r carries a constant current i. It is placed in a uniform magnetic field B such that B is perpendicular to the plane of the loop. The magnetic force acting on the loop is
EASY
12th Odisha Board
IMPORTANT
The time rate of work done by a magnetic field on a charged particle moving on a helical path is
MEDIUM
12th Odisha Board
IMPORTANT
Draw the magnetic lines of induction due to a conductor carrying current in the upward direction.
MEDIUM
12th Odisha Board
IMPORTANT
Sketch a curve to show how the magnetic flux density near a straight conductor carrying current, varies with distance away from the current.
MEDIUM
12th Odisha Board
IMPORTANT

The number of turns and the radius of a flat circular coil carrying current are both doubled. What happens to the original magnetic field produced at its centre?