Physics, asked by javedfaaique1411, 10 days ago

a circular coil consists of unknown number of turns of wire each 50 cm in diameter in a 0.4T magnetic field. the loop need to rotate at 60Hz and generate an average voltage of 120v. how many turns must be there in coil​

Answers

Answered by luckyaditya4507
2

Answer:

Initial magnetic flux through the coil,

ϕ

1

=B

H

Acosθ=3.0×10

−5

×(π×10

−2

)×cos0

=3π×10

−7

Wb

Final magnetic flux after the rotation

ϕ

f

=3.0×10

−5

×(π×10

−2

)×cos180

=−3π×10

−7

Wb.

Induced emf, ϵ=−N

dt

=−

t

N(ϕ

f

−ϕ

i

)

=−

0.25

500(−3π×10

−7

−3π×10

−7

)

=

0.25

500×(6π×10

−7

)

=3.8×10

−3

V=

R

ϵ

=

3.8×10

−3

V

=1.9×10

−3

A.

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