Home › CBSE Class 12 (Science) › Physics › Electromagnetic Induction › A 5 H coil has its current changing at 2 A/s. Wh…
A 5 H coil has its current changing at 2 A/s. What is the magnitude of the self-induced emf?
A2.5 V
B10 V
C3 V
D7 V
Answer & Solution
Correct answer: B. 10 V
Back emf magnitude equals L times dI/dt, which is 5 x 2 = 10 V.
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 iThe speed of rotation of an ac generator coil is doubled, other things equal. How does theA 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?