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Consider a current loop lying in the plane of the page. Suppose that there is a...

Consider a current loop lying in the plane of the page. Suppose that there is a magnetic field which is pointing into the page. If the area of the loop is increased by stretching it, what direction is the induced current in the loop? (clockwise or counterclockwise)

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Answer #1

Answer-Anticlockwise direction.

Magnetic field is pointing into the page.So if we increase the surface area of loop, more number of magnetic lines pass through the loop increasing the flux.

As a result emf induced in that current loop.The emf induced is the rate of change of flux with negative sign.

The negative sign in Faraday's law comes from the fact that the emf induced in the coil acts to oppose any change in the magnetic flux.So the current flows insuch a way that upper surface of current loop acts as north pole. by flowing current in anticlockwise direction.

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