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If a bar of steel is placed in a solenoi...

If a bar of steel is placed in a solenoid, then it changes to________ .

A

an electric bell

B

an electromagnet

C

a dynamo

D

a permanent magnet

Text Solution

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The correct Answer is:
D
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PEARSON IIT JEE FOUNDATION-ELECTROMAGNETISM-CONCEPT APPLICATION ( LEVEL 1)
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  2. The frequency of the ringing of the bell in an electric bell can be al...

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  3. In a D.C. motor, concave cylindrical magnets produce amagnetic field.

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  4. When there is abetween a magnet and a conductor, an EMF is induced in ...

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  5. Match the entries in Column A with the appropriate ones in Column B.

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  6. A transformer contains 100 and 150 turns in its primary and secondary ...

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  7. A transformer contains 250 and 150 turns in its primary and secondary ...

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  8. In an electric generator, the voltage induced across the terminals of ...

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  9. A current passes from south to north, through a conductor placed in a ...

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  10. Magnetic field lines inside a solenoid

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  11. In an electric generator, the voltage induced across the terminals of ...

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  12. If a bar of steel is placed in a solenoid, then it changes to .

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  13. The work done in bringing a bar magnet near a coil of radius 14 cm is ...

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  14. The observation made of Faraday from the experiments on electromagneti...

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  15. The strength of magnetic field due to a straight current carrying cond...

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  16. The magnetic lines of force around a current carrying straight conduct...

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  17. In the phenomenon of electromagnetic induction, energy of the coil or ...

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  18. A coil is moved towards a stationary magnet. The voltage induced in th...

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  19. Both the galvanometer and galvanoscope can be used to.

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  20. A magnet and a coil are taken. In which of the following cases, emf is...

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