Question

Identify the figure and explain its use.

Hint:

An electric bell converts electrical energy into sound energy using electromagnets. It operates by attracting and releasing a metal armature repeatedly to strike a bell.

Answer 1

Step 1: Identifying the figure
The diagram shows an electric bell, a common application of electromagnets in daily life.
Step 2: Working principle
- When an electric current passes through the coil, it acts as an electromagnet. - The electromagnet attracts the iron armature, causing the hammer to strike the bell. - This movement breaks the circuit momentarily, deactivating the electromagnet. - The armature returns to its original position, reconnecting the circuit and repeating the process, producing a continuous ringing sound.
Step 3: Uses of an electric bell
- Used in schools, homes, and industries as a signaling device. - Used in alarm systems for security alerts. - Common in telephone ringers and buzzers. Thus, the electric bell operates using the principle of electromagnetism to produce sound.