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प्रश्न
State any two advantages of electromagnets over permanent magnets.
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उत्तर
Following are the advantages of electromagnet over permanent magnets.
1) An electromagnet can produce a strong magnetic field
2) The strength of the magnetic field of an electromagnet can be easily changed by changing the current in its solenoid.
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संबंधित प्रश्न
State two advantages of an electromagnet over a permanent magnet.
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(a) P1 and P2
(b) Q1 and Q2
(c) P1 and Q1
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(d) both deflection and oscillation magnetometer if the earth's horizontal field is not known
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Reason: Coercivity of soft iron is small.
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