Question

Read the following statements and answer whether the given statement is true or false.
In a generator, magnitude of the induced current can be increased by decreasing the speed of rotation of armature.

• A. True
• B. False

Answer 1

The correct option is B False

We know that in generator magnetic flux linked with coil is given by

$\varphi =NBA\sin \omega t$ where $\omega$=angular speed of rotation of coil

Magnitude of e.m.f.=$⟹E=\frac{d\varphi }{dt}=NBA\omega \cos \omega t$

Since, $E\propto \omega ⟹I\propto \omega$

Hence, magnitude of induced current decreases by decreasing the speed of rotation of coil.

Hence, given statement is $False$.