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For protecting a sensitive equipment fro...

For protecting a sensitive equipment from the external magnetic field, it should be

A

placed inside an aluminium can

B

placed inside an iron can

C

wrapped with insulation around it when passing current through it

D

surrounded with fine copper sheet

Text Solution

Verified by Experts

The correct Answer is:
B

Iron is a ferromagnetic substance. There are no magnetic lines of force inside a frerromagnetic substance. So equipments may be protected by placing it inside the can be made of a ferromagnetic subtances. Hence it is placed inside the iron can.
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RESONANCE ENGLISH-MAGNETIC FIELD AND FORCES-Exercise
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  10. Which of the following relations is not correct?

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  11. The hysteresis loop for the material of a permanent magnet is:

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  12. The desirable properties for making permanent magnets are

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  13. (a)Soft iron is a conductor of electricity. (b) It is a magnetic mater...

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  14. Soft iron is used in many parts of electronical matchines for

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  16. Electromagnets are made of soft iron because soft iron has

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  17. The magnetic moment of a diamagnetic atom is

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