A circular loop of radius 21 cm is located in the plane of the paper inside a ho

Question

A circular loop of radius 21 cm is located in the plane of the paper inside a homogeneous magnetic field of 0.7 T pointing into the paper. It is connected in series with a resistor of 289 ?. The magnetic field is now increased at a constant rate by a factor of 2.8 in 15.0 s.

Calculate the magnitude of the induced emf in the loop in V during that time.

Calculate the current induced in the loop in A during that time.

Calculate the average induced voltage, in V, when the magnetic field is constant at 1.96 T while the loop is pulled horizontally out of the magnetic field region in 1.5 s at constant speed.

Explanation / Answer

The area of the loop is:

A = pie r

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