State whether the following statements are true or false :
An electric bell has an electromagnet.

Answer

To determine whether the statement "An electric bell has an electromagnet" is true or false, we can analyze the components and working of an electric bell step by step.

### Step 1: Understanding the Components of an Electric Bell
An electric bell consists of several components:
- A battery (power source)
- A switch
- An electromagnet
- A metal armature
- A hammer
- A gong
- Wires
- A metal screw

### Step 2: Function of the Electric Bell
When the switch is closed, the electric circuit is completed, allowing electric current to flow through the circuit.

### Step 3: Role of the Electromagnet
The electric current flows through the electromagnet, causing it to generate a magnetic field. This magnetic field attracts the metal armature.

### Step 4: Action of the Hammer
As the armature is attracted by the electromagnet, it moves towards the electromagnet, causing the hammer attached to it to strike the gong. This action produces sound.

### Step 5: Breaking the Circuit
When the hammer strikes the gong, the armature moves away from the electromagnet, breaking the circuit. This stops the flow of electric current.

### Step 6: Resetting the Mechanism
With the current stopped, the electromagnet loses its magnetism, allowing the armature to return to its original position. This process can repeat, producing a continuous ringing sound.

### Conclusion
Since the electric bell indeed uses an electromagnet as a crucial part of its mechanism, the statement "An electric bell has an electromagnet" is **TRUE**.

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