Two wires of equal length are bent in the form of two loops. One loop is square whereas the other is circular. These are suspended in same magnetic field and same current is passed through them. Explain with reason which will experience greater torque?

Can a Moving Coil Galvanometer can be used to detect an A.C. in a circuit .Give reason

Out of Ammeter and Milliammeter, which has the higher resistance?

Proton is moving along the axis of a solenoid carrying current of 2 A and 50 number of turns per unit length. What will be the force acting on the particle

Out of Voltmeter and Millivoltmeter, which has the higher resistance?

Suppose a helical spring is suspended from the roof of a room and very small weight is attached to its lower end what will happen to the spring when a current is passed through it?Give reason to support your answer?

Name the physical quantity whose unit is tesla. Hence define a tesla.

What are the dimensions of \({ \mu }_{ o }/4\pi \) ?

Explain, how moving charge is a source of magnetic field.

An electron moving with a velocity of 10⁷ ms^-1 enters a uniform magnetic field of 1 T, along a direction parallel to the field. What would be its trajectory?

Two similar coils of radius R, are lying concentrically with their planes at right angles to each other. The currents flowing in them are I and 2 I respectively. The resultant magnetic field at the centre will be :

An electron moving in a circular orbit of radius r makes n rotations per second. The magnetic field produced at the centre has magnitude

A long solenoid has n turns per metre and current I A is flowing through it. The magnetic field induction at the ends of the solenoid is 

A circular coil carrying current behaves as a

A circular coil of n turns and radius r carries a current I. The magnetic field at the centre is 

Current carrying wire produces

The magnetic field at a perpendicular distance of 2 cm from an infinite straight current carrying conductor is 2x10^-6 T. The current in the wire is