A circular loop of radius r is placed in a region where magnetic field increases with respect to time as B(t)=at then induced emf in coil

a. pi r 2 a
b. 3Pi r 2 a
c. 2 pi r 2 a
d. 4 pi r 2 a

Question

A circular loop of radius r is placed in a region where magnetic field increases with respect to time as B(t)=at then induced emf in coil a. pi r 2 a b. 3Pi r 2 a c. 2 pi r 2 a d. 4 pi r 2 a

Arun · Answer

Dear student phi = BA E = d(phi)/dt = A dB/dt since B = at, hence dB/dt = a Hence E = a* A = a * pi * r 2

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A circular loop of radius r is placed in a region where magnetic field increases with respect to time as B(t)=at then induced emf in coil a. pi r 2 a b. 3Pi r 2 a c. 2 pi r 2 a d. 4 pi r 2 a

A circular loop of radius r is placed in a region where magnetic field increases with respect to time as B(t)=at then induced emf in coil

a. pi r 2 a
b. 3Pi r 2 a
c. 2 pi r 2 a
d. 4 pi r 2 a

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A circular loop of radius r is placed in a region where magnetic field increases with respect to time as B(t)=at then induced emf in coil a. pi r 2 a b. 3Pi r 2 a c. 2 pi r 2 a d. 4 pi r 2 a

A circular loop of radius r is placed in a region where magnetic field increases with respect to time as B(t)=at then induced emf in coil a. pi r 2 ab. 3Pi r 2 ac. 2 pi r 2 ad. 4 pi r 2 a

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A circular loop of radius r is placed in a region where magnetic field increases with respect to time as B(t)=at then induced emf in coil

a. pi r 2 a
b. 3Pi r 2 a
c. 2 pi r 2 a
d. 4 pi r 2 a