A coil has `2000` turns and area of `70cm^(2)`. The magnetic field perpendicular to the plane of the coil is `0.3 Wb//m^(2)` and takes `0.1` sec to rotate through `180^(0)`. The value of the induced e.m.f. will be

If number of turns of 70 cm^(2) coil is 200 and it is placed in a magnetic field of 0.8 Wb//m^(2) which is perpendicular to the plane of coil and it is rotated through an angle 180^(@) in 0.1 sec , then induced emf in coil :

If number of turns of 70 cm^(2) coil is 200 and it is placed in a magnetic field of 0.8 Wb//m^(2) which is perpendicular to the plane of coil and it is rotated through an angle 180^(@) in 0.1 sec , then induced emf in coil :

A coil of copper having 1000 turns is placed in a magnetic field B=4xx10^(-3)T perpendicular to its plane. The cross-sectional area of the coil is 0.05m^(2) . If it turns through 180^(@) in 0.01s , then the e.m.f induced in the coil is

Find the e.m.f. induced in a coil of 20 turns and cross-sectional area 0.2 m^2 , when a magnetic field perpendicular to the plane of the coil changes form 0.1 Wb m^-2 to 0.5 Wbm^-2 at a uniform rate over a period of 0.05 s.

A coil of area 10 cm^2 has 200 turns. Magnetic field of 0.1 Wb//m^2 is perpendicular to the plane of the coil. The field is reduced to zero in 0.1 s, the induced emf in the coil is

A coil has an area of 0.05 m^(2) and it has 800 turns. It is placed perpendicular in a magnitude field of strength 4xx10^(-5)Wb//m^(2) , it is rotated through 90^(@) in 0.1 sec. the average e.m.f. induced in the coil is

A coil has an area of 0.05 m^(2) and it has 800 turns. It is placed perpendicular in a magnitude field of strength 4xx10^(-5)Wb//m^(2) , it is rotated through 90^(@) in 0.1 sec. the average e.m.f. induced in the coil is