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ICSE Class 10 Physics Question 37 of 136

Electro-magnetism — Question 16

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Question

Question 16

Name the material used for making the armature of an electric bell. Give a reason for your answer.

Answer

The material used for making the armature of an electric bell is soft iron.
It is used as the core of the electromagnet in an electric bell because it has low retentivity and therefore, the bar remains magnetized so long as the electric current flows through the solenoid but it gets demagnetized as soon as the current is switched off.