Question

An electromagnet is wound with 800 turns. Find the value of average emf
induced, if it is moved to that magnetic field is change from 1 mWb to 0.25
mWb in 0.2 sec.​

Answer 1

Answer:

Change n in magnetic flux Δϕ=1−10=−9 Weber

Time taken Δt=0.1 sec

So, emf induced in the coil E=−

Δt

Δϕ

⟹ E=−

0.1

(−9)

=90 Volts

This is the answer

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Answer 2

Answer:

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