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The torque on the loop...

The torque on the loop

A

`pi I B R^2`

B

`p B I^2R^2`

C

`pi B^2IR^2`

D

`zero

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MODERN PUBLICATION-TEXTUAL QUESTIONS-EXERCISE
  1. A circular loop of area 0.01 m^(2) carrying a current of 10 A, is held...

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  2. A circular loop of radius R carrying a current is placed in a uniform ...

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  3. The torque on the loop

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  4. A current carrying loop is placed in uniform magnetic field. The torq...

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  5. The basic instrument used to detect the current:

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  6. A galvanometer is said to be sensitive, if it gives a

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  7. Give two factors by which voltage sensitivity of a moving coil galvano...

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  8. The deflection in a moving coil galavanometer falls from 50 to 10 divi...

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  9. Can we increase/decrease the range of a given ammeter?

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  10. A galvanometer can measure a current up to 20 milliampere. When it is ...

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  11. The resistance of an ideal ammeter is

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  12. The resistance of ideal voltmeter is:

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  13. When a bar magnet is immersed in a heap of iron fillings stick to the ...

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  14. Which one of the following statements is correct ? The field strength ...

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  15. A steel wire of length l has a magnetic moment M. It is then bent into...

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  16. A bar magnet suspended freely has period of oscillation of 2s. Now, th...

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  17. A large magnet is broken into two pieces, so that their lengths are in...

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  18. Choose the correct answer

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  19. A circular loop is carrying current and is said to be equivalent to ma...

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  20. A circular loop is carrying current and is said to be equivalent to a ...

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