AC Generator

The video explains how electromagnetic induction is used in AC generators. It describes the structure of an AC generator, which includes a coil that rotates within a magnetic field. The video details the working principle, showing how the coil's movement induces an electromotive force (emf) and generates alternating current. It also explains the direction of current flow and how it changes with the coil's rotation, completing a cycle every 360 degrees.

What is the primary function of an AC generator?

• To convert electrical energy into mechanical energy

• To convert mechanical energy into electrical energy

• To store electrical energy

• To amplify electrical signals

In the initial position of the coil in an AC generator, what is the value of the induced emf?

• Maximum

• Negative peak

• Zero

• Constant

According to Fleming's left-hand rule, what is the direction of the induced emf in the arm PQ when the coil starts moving?

• From R to S

• From S to R

• From P to Q

• From Q to P

What happens to the value of the induced emf as the coil aligns itself perpendicularly to the magnetic field?

• It remains constant

• It reaches its negative peak

• It becomes zero

• It reaches its maximum

How does the direction of current change after every half rotation of the coil in an AC generator?

• It remains the same

• It reverses

• It becomes zero

• It doubles