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A power line lies along the east-west di...

A power line lies along the east-west direction and carries a current of 10 ampere. The force per metre due to the earth's magnetic field of `10^(-4)` tesla is

A

`10^(-5) N`

B

`10^(-4) N`

C

`10^(-3) N`

D

`10^(-2) N`

Text Solution

Verified by Experts

The correct Answer is:
C
`F=BiL`
`=10^(-4)xx10xx1`
`=10^(-3)N`
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RESONANCE-ELECTRODYNAMICS-Exercise-1 PART-2
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  5. A steady current i flows in a small square lopp of wire of side L in a...

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  7. A bar magnet has a magnetic moment 2.5JT^(-1) and is placed in a magne...

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  8. A circular loop of area 1cm^2 , carrying a current of 10 A , is placed...

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  9. A power line lies along the east-west direction and carries a current ...

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  10. A circular coil of radius 20 cm and 20 turns of wire is mounted vertic...

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  11. Which materials have negative value of magnetic susceptibility?

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  12. When a small magnetising field H is applied to a magnetic material the...

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  14. A paramagnetic material is placed in a magnetic field. Consider the fo...

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  15. Which of the following relations is not correct?

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  16. The hysteresis cylcle for the material of a permanent magnet is

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  17. When a ferromagnetic material goes through a hysteresis loop, the magn...

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  18. The material for making permanent magnets should have:

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  19. (a) Soft iron is a conductor of electricity. (b)It is a magnetic mat...

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  20. Soft iron is used in many electrical machines for:

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