Home › AP EAPCET (Engineering) › Physics › Electromagnetic Induction › The negative sign in Faraday's law of induction …
The negative sign in Faraday's law of induction represents which fact?
AEmf is always negative
BResistance is negative
CCurrent opposes the change
DCharge is conserved
Answer & Solution
Correct answer: C. Current opposes the change
The sign expresses Lenz's law: the induced emf drives a current that opposes the change in flux.
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?