Question

Mark ‘T’ if the statement is true and ‘F’ if it is false: An electric bell has an electromagnet. (T/F)

• A. True
• B. False

Answer 1

The correct option is A True

Step 1: Electromagnet

1. When an electric current is used to induce a magnetic field, hence showing magnetic properties it is called an electromagnet.
2. There are generally made up of a metallic core wounded by conducting wires.
3. The current flowing through this wire generates the magnetic field.
4. Due to the magnetic flux generated by this magnetic field, the metallic core acts as a magnet.
5. Hence, the magnetic field disappears when the current flow is stopped.
6. Therefore, the metallic core loses its magnetic properties and is called a temporary magnet.

Step 2: Electric Bell

1. An electric bell is made up of one or multiple electromagnets.
2. Upon pushing the switch, a closed circuit is formed.
3. This lets the current flow through the U-shaped electromagnet which results in the generation of a magnetic field.
4. This temporarily generated magnetic field attracts the iron armature.
5. When the switch is let go, the circuit becomes open and the current stops flowing.
6. This demagnetizes the electromagnet.

Hence, the given statement is true.