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Magnetism And Matter

Question
CBSEENPH12040021
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A rectangular, a square a circular and an elliptical loop, all in the (x-y) plane, are moving out of a uniform magnetic field with a constant velocity,bold V with bold rightwards arrow on top space equals space v bold italic i with hat on top The magnetic field is directed along the negative z- axis direction. The induced emf, during the passage of these loops, out the field region, will not remain constant for

  • the rectangular, circular and elliptical loops

  • the circular and the elliptical loops

  • only the elliptical loops

  • any of the four loops

Solution

B.

the circular and the elliptical loops

Area coming out per second from the magnetic field is not constant for elliptical and circular loops, so induced emf, during the passage of these loops, out of the field region will not remain constant for the circular and the elliptical loops.

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