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.

$As\varphi =NABcos{90}^o=0$
$\epsilon ={\epsilon }_{0}sin{90}^o={\epsilon }_0=maximum$
$\theta$ is the angle between the field and normal to the plane of the coil.