3 years ago

B.

Physics

1 answer:

Elan Coil [88]3 years ago

3 0

Answer b c

Explanation:

i think those are the best answers

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A 0.270 m radius, 510-turn coil is rotated one-fourth of a revolution in 4.17 ms, originally having its plane perpendicular to a

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0.35701 T

Explanation:

$B_i$ = Initial magnetic field

$B_f$ = Final magnetic field

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Induced emf is given by

$\epsilon=-N\frac{d\phi}{dt}\\\Rightarrow \epsilon=-N\frac{B_fAcos90-B_iAcos0}{dt}\\\Rightarrow \epsilon=N\frac{B_iA}{dt}\\\Rightarrow B_i=\frac{\epsilon dt}{NA}\\\Rightarrow B_i=\frac{10000 \times 4.17\times 10^{-3}}{510\times \pi 0.27^2}\\\Rightarrow B_i=0.35701\ T$