The magnetic flux inside a coil changes uniformly from 12×10-3wb to 24×10-3wb in 12ms.The induced emf in (volts) will be ________

The magnetic flux inside a coil changes uniformly from 12×10-3wb to 24×10-3wb in 12ms.The induced emf in (volts) will be ________

  1. A

    12

  2. B

    1

  3. C

    12×103

  4. D

    10

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    Solution:

    Given that 12×10-3wb ϕ2=24×10-3wb ϕ=ϕ2-ϕ1

    =12×10-3w

    t=12ms=12×10-3w

    e=dϕdt=12×10-312×10-3=1volt

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