Physics
Electromagnets are made up of:
- steel
- copper
- brass
- soft iron
Electro-Magnetism
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Answer
soft iron
Reason — Electromagnets are temporary magnets made up of soft iron because they can easily be magnetized on passing electric current and gets de-magnetized when flow of electric current is stopped.
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Related Questions
Match the following:
Column A Column B (a) Human body (i) electric bell (b) Silk thread (ii) current (c) Charge in motion (iii) conductor (d) Soft iron (iv) electromagnet (e) Electromagnet (v) insulator A freely suspended magnet rests in:
- east-west direction
- north-south direction
- north-east direction
- north-west direction
An electromagnet is used in:
- electric oven
- ammeter
- electric bell
- radio set
The purpose of armature in an electric bell is:
- to make and break the circuit
- to produce sound
- to produce magnetic field
- to provide spring action