Question

which device requires an electric power supply?
a. a generator
b. a motor
c. a permanent magnet
d. a turbine

Explanation:

• A generator converts mechanical energy into electrical energy and does not require an electric power supply to function in its basic energy - conversion role.
• A motor converts electrical energy into mechanical energy. It needs an electric power supply to operate.
• A permanent magnet has its own magnetic field and does not rely on an electric power supply for its magnetic properties.
• A turbine (e.g., steam turbine, wind turbine) converts fluid or wind energy into mechanical energy and does not need an electric power supply for its primary energy - conversion process.

Answer:

B. A motor