Question

When the plane of the armature of an a.c. generator is parallel to the field, in which it is rotating

• A. Both the flux linked and induced emf in the coil are zero.
• B. The flux linked with it is zero, while induced emf is maximum.
• C. Flux linked is maximum while induced emf is zero.
• D. Both the flux and emf have their respective maximum values.

Answer 1

Answer: (B)

The flux linked with it is zero, while induced emf is maximum.

Answer 2

As $\varphi = NAB\cos 90º = 0$

$\varepsilon = \varepsilon_{0}\sin 90º = \varepsilon_{0} =$ (maximum)

$\theta$ is the angle between the field and normal to the plane of the coil.