Question 123: Electromagnetic Induction

Question

A coil of cross-sectional area A having n turns is placed in a uniform magnetic field B. When it is rotated with an angular velocity $$\omega ,$$ the maxium e.m.f. induced in the coil will be:

Accepted Answer

Flux in the coil, $$\phi $$ = nBA sin($$\omega $$t)
When n = no. of turns
$$\,\,\,\,\,\,\,\,\,\,\,\,\,\,$$ A = Area of coil
$$\,\,\,\,\,\,\,\,\,\,\,\,\,\,$$$$\omega $$ = angular speed
Induced emf,
$$\left| e ight| = {{d\phi } \over {dt}}$$
= nBA$$\omega $$ cos$$\omega $$t
$$	herefore\,\,\,$$ e
max
= nBA$$\omega $$

Answer

3 nBA$$\omega $$

Answer

$${3 \over 2}$$ nBA$$\omega $$

Answer

nBA$$\omega $$

Answer

$${1 \over 2}$$ nBA$$\omega $$

Electromagnetic Induction

A coil of cross-sectional area A having n turns is placed in a uniform magnetic field B. When it is rotated with an angular velocity $\omega ,$ the maxium e.m.f. induced in the coil will be:

Choose the correct answer: