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To double the torque acting on a coil of...

To double the torque acting on a coil of n-turns, when placed in a magnetic field

A

area of the coil and the magnetic induction should be doubled

B

area and current through the coil should be doubled

C

only area of coil should be doubled

D

number of turns are to be halved

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The correct Answer is:
C
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AAKASH SERIES-MOVING CHARGES AND MAGNETISM-EXERCISE-IA
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  2. The current that must flow through a galvanometer to have a deflection...

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  3. To double the torque acting on a coil of n-turns, when placed in a mag...

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  4. A tangent galvanometer shows no deflection when a current is passed th...

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  5. A) Tangent galvanometer is a moving magnet type galvanometer B) Tang...

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  6. The plane of the coil of tangent galvanometer is kept parallel to magn...

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  7. A) In Tangent galvanometer the circular frame is rotated until the pla...

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  8. In case of Tangent galvanometer A) The galvanometer reduction factor...

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  9. If 'r' is the radius and 'n' is number of turns of coil of a T.G, then...

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  10. A rectangular loop carrying a current i(1), is situated near a long st...

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  11. When a current loop is placed in a uniform magnetic field i) barF(R)...

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  12. A flat , rectangular coil, carrying current, is placed beside a long s...

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  13. A moving coil galvanometer can be converted into

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  14. The correct statement among the following is:

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  16. Statement A: Ammeter is a low resistance galvanometer Statement B: V...

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  17. To increase the range of a voltmeter we need to connect a suitable:

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  18. An ammeter and a voltmeter of resistance R are connected in series to ...

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  19. Two identical galvanometers are converted into an ammeter and a millia...

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  20. A galvanometer of resistance, G is shunted by a resistance 5 ohm. To k...

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