Physics, asked by rashmikol1352, 10 months ago

If the angular speed of the armature of a dynamo is doubled then the amplitude of the induced e.m.f will become_______.

Answers

Answered by aristeus
32

Answer:

If we double the angular speed then amplitude of emf will also be double.

Explanation:

The magnetic flux through the coil is given by \Phi =BAcos\Theta

We know that induced emf is given by e=-N\frac{d\Phi }{dt}

e=-N\frac{dBAcos\Theta  }{dt}

e=NBAsin\Theta \frac{d\Theta }{dt}

e=NBA\omega sin\Theta

From the relation we can see that if we double the angular speed then amplitude of emf will also be double.

Answered by shashwatjha2002
2

Answer: TWICE

Explanation:

amplitude= NABw

if w'=2w,

new amplitude= 2Xold amplitude.

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