Question

9. Long answer questions
1. List four basic components of an electric circuit and draw their standard symbols.
2. What is an electromagnet? Give two uses of electromagnets. Name two factors on which the
strength of an electromagnet depends.
3. Describe a simple experiment to demonstrate that an electric current produces a magnetic effect
4. What is the purpose of using an electromagnet in an electric bell?​

Answer 1

Answer:

1. Every electric circuit, regardless of where it is or how large or small it is, has four basic parts: an energy source (AC or DC), a conductor (wire), an electrical load (device), and at least one controller (switch).
2. soft metal core made into a magnet by the passage of electric current through a coil surrounding it. ★Generators, motors, and transformers.

Electric buzzers and bells.

◒The strength of an electromagnet depends on:

The strength of the current passing through the coil, the greater the current, the greater the strength. ...

The number of turns in the coils, the greater the number of coils, the greater the strength. ...

Whether the core is made up of a soft or hard magnetic material.

3. It is observed that when a compass is brought near a current carrying conductor the needle of compass gets deflected because of flow of electricity. This shows that electric current produces a magnetic effect.

4. When an electric current flows through the coils, the electromagnet creates a magnetic field which pulls the armature towards it, causing the hammer to strike the bell.

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