Question

In the circuit shown in figure, when the circuit is completed, the hammer strikes the gong. Which of the following force is responsible for the movement of hammer?

• A. Gravitational force alone
• B. Electrostatic force alone
• C. Magnetic force alone
• D. Frictional force alone

Answer 1

Answer: (C)

Magnetic force alone

When the electric circuit is completed the electromagnet is activated and the soft iron armature is strongly pulled. The hammer strikes the gong producing the sound.
So, the magnetic force is responsible for the movement of hammer.