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The polarity of induced emf is given by...

The polarity of induced emf is given by

A

a. Ampere's circuital law

B

b. Biot-Savart law

C

c. Lenz's law

D

d. Fleming's right hand rule

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Knowledge Check

  • When the angle of orientation omegat= (3pi)/(2) , the value of induced emf is given by :

    A
    `E_(0)`
    B
    0
    C
    `oo`
    D
    `-E_(0)`

  • When a conductor of length l moving with velocity v in a uniform magnetic field B, the induced emf is given by :

    A
    `e=NA Bomega`
    B
    `e=-(dphi)/(dt)`
    C
    `e=(dB)/(dt)`
    D
    `e=-Blv`

  • When a coil of area A is oriented through an angle of orientation (theta=omega t) in a uniform magnetic field B, the induced emf is given by :

    A
    `e=2pi v" NAB "sin omegat`
    B
    `e=E_(0)cos omega t`
    C
    `e=NAB sin theta`
    D
    `e=NAB cos omegat`

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    A graph between the magnitude of the magnetic flux linked with a closed loop and time is given in the figure. Arrange the regions of the graph in ascending order of the magnitude of induced emf in the loop.

    The magnitude of the induced emf in a conductor depends on the

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    The strength of the induced emf depends on of the coil.

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