Home › AP EAPCET (Engineering) › Physics › Electromagnetic Induction › The speed of rotation of an ac generator coil is…
The speed of rotation of an ac generator coil is doubled, other things equal. How does the peak emf change?
AIt is reduced to half
BIt becomes twice
CIt becomes four times
DIt stays unchanged
Answer & Solution
Correct answer: B. It becomes twice
Peak emf is proportional to angular speed, so doubling the speed doubles it.
Related questions
What are the dimensions-based units of emf, as listed for electromotive force?Induced emf in a loop is what when the flux through it stays constant?A generator coil's plane is perpendicular to the field. What is the emf then?In an ac generator, the angle between B and the coil's area vector at time t is wt. What iA coil has 50 turns, area 0.02 square metre, in a 0.4 T field, rotating at 100 rad/s. WhatA coil of N turns, area A rotates at n revolutions per second in a field B. What is the maHow are the ends of the coil of an ac generator joined to the external circuit?In an ac generator, the coil that is rotated in the magnetic field is called what?