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The magnetic flux linked with a coil, in...

The magnetic flux linked with a coil, in webers is given by the equations `phi` = `3t^2 + 4t + 9`. Then the magnitude of induced e.m.f. at t =2 second will be

A

2 volt

B

4 volt

C

8 volt

D

16 volt

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CHETANA PUBLICATION-Electromagnetic Induction-EXERCISE
  1. In a circuit with a coil of resistance 2 ohms, the magnetic flux chang...

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  2. A rectangular coil of 20 turns and area of cross section 25 sqcm has a...

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  3. The magnetic flux linked with a coil, in webers is given by the equati...

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  4. A coil has an area of 0.05 m^2 and it has 800 turns. It is placed perp...

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  5. A 10 metre wire kept in east-west direction is falling with velocity 5...

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  6. A metal conductor of length 1m rotates vertically about one of its end...

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  7. A conducting wire is moving towards right in a magneticfield B.The dir...

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  8. An e.m.f. of 5 volt is produced by a self inductance, when the current...

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  9. A 50 mH coil carries a current of 2 ampere. The energy stored in joule...

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  10. The current passing through a choke coil of 5 Henry is decreasing at t...

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  11. In what form is the energy stored in an inductor

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  12. The average e.m.f. induced in a coil in which the current changes from...

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  13. Two pure inductors each of self inductance L are connected in parallel...

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  14. The self inductance of a coil is 5 H, a current of 1 A change to 2 A w...

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  15. A straight conductor of length 0.4 m is moving with a velocity of 7m//...

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  16. A metal rod of length lm, rotates about its one end in a plane at righ...

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  17. The magnetic flux through a coil is 5 xx10^-4 Wb at time t = 0. It red...

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  18. Dimensional formula of magnetic flux is

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  19. A magnetic field of 2 xx 10^-2Wb//m^2actsat the right angles to a coil...

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  20. A rectangular coil of 25 turns, area of 25 cm^2 and resistance of 4 oh...

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