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mamaluj [8]
4 years ago
12

A 15-turn circular wire loop with a radius of 3.0 cm is initially in a uniform magnetic field with a strength of 0.5 T. The fiel

d decreases to zero over a time of 0.10 sec. What is the induced emf?
Physics
1 answer:
miskamm [114]4 years ago
8 0

Answer:

0.212V

Explanation:

The induced emf in circular loop is \epsilon=-d\frac{\phi_B}{dt}=-NA\frac{dB}{dt}

N = Number of loops = 15

A = Cross sectional Area = \pi0.03^{2} = 0.0009\pi

dB = change in magnetic Field = 0-0.5 = -0.5

dt = time taken = 0.1sec

\epsilon=-15*0.0009\pi *\frac{-0.5}{0.1} = 0.212V

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