The radius of a circular coil having 50 turns is 2 cm. Its plane is normal to the magnetic field. The magnetic field changes from 2T to 4T in 3.14 sec. The induced emf in coil will be :-

The radius of a circular coil having 100 turns is 2 cm. its plane is normal to the magnetic field. The magnetic field changes from 4T to 8T in 3.14 sec. The induced emf in coil will be

The radius of a circular coil having 100 turns is 5 cm .its plane is normal to the magnetic field. The magnetic field changes from 2T to 10 T in 3.14 sec. The induced emf in coil will be

A circular coil of 100 turns has radius 4 cm. It is placed with its plane perpendicular to a magnetic field of 3T. If the magnetic field, reduces to 1 T in 0.2s, calculate the e.m.f induced in the coil.

A circular coil of 50 turns and radius 0.2 cm carries a current of 12 A. Find magnetic field at the centre of the coil.

A coil having n turns and area A is initially placed with its plane normal to the magnetic field B. It is then rotated through 180^(@) in 0.2 sec. The emf induced at the ends of the coils is ___

A coil of 50 turns and 4cm radius carries 2A current then magnetic field at its centre is :- ?

A 50 turns circular coil has a radius of 3 cm, it is kept in a magnetic field acting normal to the area of the coil. The magnetic field B increased from 0.10 tesla to 0.35 tesla in 2 milliseconds. The average induced e.m.f in the coil is

A 50 turns circular coil has a radius of 3cm , it is kept in a magnetic field acting normal to the area of the coil. The magnetic field B increased from 0.10 tesla to 0.35 tesla in 2 milliseconds . The average induced e.m.f. in the coil is

A 50 turns circular coil has a radius of 3 cm, it is kept in a magnetic field acting normal to the area of the coil. The magnetic field B increased from 0.10 tesla to 0.35 tesla in 2 milliseconds. The average induced e.m.f in the coil is

A circular coil of radius 10 cm having 100 turns carries a current of 3.2 A. The magnetic field at the center of the coil is