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The magnetic flux across a coil, of 50 t...

The magnetic flux across a coil, of 50 turns and of diameter 0.1 m, changes from `3xx10^(-4)Wb" to "10^(-4)Wb` in 0.02 s. The emf induced in the coil is

A

3.9 mV

B

10 mV

C

15 mV

D

196 mV

Text Solution

Verified by Experts

The correct Answer is:
B
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CHHAYA PUBLICATION-ELECTROMAGNETIC INDUCTION & ALTERNATING CURRENT-EXERCISE
  1. If the emf induced in an electrical circuit be e and the current induc...

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  2. The magnetic flux across a coil, of 50 turns and of diameter 0.1 m, ch...

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  3. A coil with a small area of 10^(-5)m^(2) is lying on the xy -plane aro...

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  4. The magnetic flux linked with a coil varies with time t as phi=at^(2)+...

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  5. Induced current in a coil due to electromagnetic induction does not de...

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  6. A metal ring is held horizontally with the ground and a bar magnet is ...

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  7. An electric potential difference will be induced between the ends of t...

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  8. In the figure a circular loop of radius r and resistance R is shown. A...

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  9. Two identical circular loops of metal wire are lying on a table withou...

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  10. A circular disc of radius 0.2 m is placed in a uniform magnetic field ...

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  11. A square wire loop of side 10 cm is placed at an angle of 45^(@) with ...

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  12. A rod of length b moves with a constant velocity v in the magnetic fie...

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  13. A boat is moving due east in a region where the earth's magnetic field...

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  14. SI unit henry (H) of inductance can be written as

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  15. The self-inductance of a long straight solenoid is L. Each of the leng...

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  16. The self inductances of two coils are 16 mH and 25 mH, and they have a...

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  17. If current I passes through a pure inductor of self-inductance L, the ...

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  18. Two solenoids of equal number of turns have their lengths and the radi...

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  19. The current I in a coil varies with time as shown in the fig. The vari...

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