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If flux in a coil changes by Deltaphi, a...

If flux in a coil changes by `Deltaphi`, and the resistance of the coil is `R`,prove that the charge flown in the coil during the flux change is `(Deltaphi)/R`.(Note :It is independent of the time taken for the change is flux)

Text Solution

Verified by Experts

The correct Answer is:
A, D
`i=epsilon/R=(Deltaphi)/(Deltat)xx1/R rArr (Deltaq)/(Deltat)=(Deltaphi)/(Deltat)xx1/R rArr Deltaq=(Deltaphi)/R`
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Knowledge Check

  • When ever the flux linked with a coil changes, then

    A
    current is always induced
    B
    an emf and a current are always induced
    C
    and emf is incduced but a current is never induced
    D
    an emf is always induced and a current is induced, when the coil is a closed one

  • Effective area of coil in a magnetic field changes with time, the flux at any time is:

    A
    `phi_(B) = B A cot omega t`
    B
    `phi_(B) = B A cos omega t`
    C
    `phi_(B) = B A tan omega t`
    D
    `phi_(B) = B A sec omega t`

  • If the flux associated with a coil changes at the rate of 240 weber in every 2 minutes, then the induced e.m.f. is

    A
    `2` volt
    B
    `0.20` volt
    C
    `3` volt
    D
    `6` volt

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