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Questions and Answers
What is the purpose of inserting a core of soft iron in an electromagnet?
To increase the strength of the magnetic field
What is the source of electricity used in a torch?
Dry cell
What is the purpose of using mains as the source of electricity for lighting a table lamp and running a refrigerator?
To power the appliances
What is a group of two or more cells called?
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What materials pass electricity through them?
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Which materials do not pass electricity through them?
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In which direction does a freely suspended magnet rest?
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What material are electromagnets made up of?
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What is the purpose of an electromagnet in an electric bell?
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What is the source of electricity in a torch?
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