The induced emf in a coil rotating in a magnetic field is maximum when the angle between the plane of the coil and the direction of field is :

Question

The induced emf in a coil rotating in a magnetic field is maximum when the angle between the plane of the coil and the direction of field is : (A) zero (B) (π/4) (C) (π/2) (D) Some angle other that those mentioned above.

Tardigrade Admin · Accepted Answer

E = Eo sin θ, where θ is the angle between B and area vector S of the coil. Since S is perpendicular to the surface, therefore when the angle between plane of the coil and the magnetic field is zero, the θ = 90. Hence E = Eo

Q. The induced emf in a coil rotating in a magnetic field is maximum when the angle between the plane of the coil and the direction of field is :

zero

$\frac{π}{4}$

$\frac{π}{2}$

Some angle other that those mentioned above.

$E = E_{o}$ sin $θ$ , where $θ$ is the angle between $B$ and area vector $S$ of the coil. Since $S$ is perpendicular to the surface, therefore when the angle between plane of the coil and the magnetic field is zero, the $θ$ = 90. Hence $E = E_{o}$