Question 31 (6 points) 31. The circuit of the figure shown is a square 30 cm...

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Question

Answer 1

Answer #1

(a) emf induced = rate of change of magnetic flux

= d $\phi$ / dt

= A dB/dt = 0.3*0.3 * (0.5 - 0) / 10*10^-3

= 4.5 V

(b) I = V/R

= 4.5 / 20 = 0.225 A

Answer 2

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