Question

The figure below shows a 11 cm diameter loop in th

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Answer #1

Area ,
A = pi*(d/2)^2
= pi*(0.11/2)^2
= 9.503*10^-3 m^2

a)
emf = A*dB/dt
= 9.503*10^-3 * 0.50
= 4.75*10^-3 V

current = V/R
= (4.75*10^-3)/0.10
= 47.5*10^-3 A
= 47.5 mA

B is increasing, so induced current will be such that induced magnetic field is is directed inward
So,clockwise

b)
emf = A*dB/dt
= 9.503*10^-3 * 0.50
= 4.75*10^-3 V

current = V/R
= (4.75*10^-3)/0.10
= 47.5*10^-3 A
= 47.5 mA

B is decreasing, so induced current will be such that induced magnetic field is is directed inward
So,clockwise

c)
There is no magnetic field perpendicular to the area
so,
emf = 0
current= 0

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