There is a uniform magnetic field (B) perpendicular to the plane of the figure in a circular region of radius a centred at O. ABCD is a conducing loop in the plane of the figure with its arms BC and DA along two radial lines from O having an angle `theta` between them. AB is circular arc of radius OB = d centred at O. CD is also a circular arc of radius `OC = b` centred at O. The magnetic field is changed at a rate `(dB)/(dt)`. (a) The emf induced in the loop ABCD. (b) Find emf induced in arc AB.

There is a uniform magnetic field (B) perpendicular to the plane of th

1.	There is a uniform magnetic field (B) perpendicular to the plane of the figure in a circular region of radius a centred at O. ABCD is a conducing loop in the plane of the figure with its arms BC and DA along two radial lines from O having an angle `theta` between them. AB is circular arc of radius OB = d centred at O. CD is also a circular arc of radius `OC = b` centred at O. The magnetic field is changed at a rate `(dB)/(dt)`. (a) The emf induced in the loop ABCD. (b) Find emf induced in arc AB.
Answer» Correct Answer - (a) Zero (b) `(a^(2) theta)/(2) (dB)/(dt)`

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