Homework Answers
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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