Question

A wire loop of radius 10 cm has a resistance of 2.0 ?. The loop is...


A wire loop of radius 10 cm has a resistance of 2.0 ?. The loop is at right angles to a uniform magnetic field B. The field strength is changing at a rate of ?B/?t = 0.10 T/s. What is themagnitude of the induced current in the loop?
A. 4.3 mA
B. 0.3 mA
C. 2.9 mA
D. 1.0 mA
E. 1.6 mA
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Answer #1

voltage = -0.1*pi*0.1^2

= 3.4159*10^-3

=> induced current = voltage /resistance

= 1.571*10^-3 A

~option E

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