If a closed loop lies partially inside and partially outside a region of changin

Question

If a closed loop lies partially inside and partially outside a region of changing magnetic field, which is true about calculating the induced electric field along the path?

a. The electric field is zero at points within the region of changing magnetic field.

b. We use the full area of the loop to calculate the electric field.

c. We use only the area within the flux change to calculate the electric field.

d. The electric field is zero at points along the path that are outside the region of changing magnetic field.

Explanation / Answer

The changing mangetic field through the loop that lies inside the changing magnetic field creates induced current along the whole path of the loop. Therefore, the electric filed is not zero at anypoint along the path of the loop. The area that lies inside the changing magnetic field region has to take to find the induced electric field.

Therefore, the answer (c) is correct.

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