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A rectangular loop which was initially i...

A rectangular loop which was initially inside the region of uniform and time - independent magnetic field, is pulled out with constant velocity v as shown in the figure

a) Sketch the variation of magnetic flux, the induced current, and power dissipated as Joule heat as function of time.
b) If instead of rectangular loop, circular loop is pulled out, do you expect the same value of induced current? Justify your answer. Sketch the variation of flux in this case with time.

Text Solution

Verified by Experts


Induced current and power, sketch is same as shown above. In case of circular coil, rate of change of area of the loop during its passage out of field is not constant, hence induced current varies accordingly.
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Knowledge Check

  • Magnetic dipole moment of rectangular loop is

    A
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    B
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    C
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    D
    None of these

  • A bar magnet is moved between two parallel circular loop A and B with a constant velocity v as shown in figure.

    A
    The current in each loop flows in the same direction
    B
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    C
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