A uniform magnetic field is restricted within a region of radius, r . The magnetic field changes with time at a rate, d B → d t . Loop one of radius R r encloses the region, r and loop two of radius, R is outside the region of magnetic field as shown in the figure below. Then the emf generated is

Question

A uniform magnetic field is restricted within a region of radius, r . The magnetic field changes with time at a rate, d B → d t . Loop one of radius R > r encloses the region, r and loop two of radius, R is outside the region of magnetic field as shown in the figure below. Then the emf generated is, 0 in loop one and zero in loop two., - d B → d t π r 2 in loop one and - d B → d t π r 2 in loop two., - d B → d t π r 2 in loop one and infinite in loop two., - d B → d t π r 2 in loop one and zero in loop two.

MARKS App · Accepted Answer

Magnetic flux linked with area of loop one is B π r 2 . So, emf in loop one is, - d B → d t π r 2 . Magnetic flux linked with area of loop two is zero. So, emf in loop two is equal to zero.

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