What is the significance of negative sign in the expression of emf

begin mathsize 12px style straight epsilon equals negative dϕ over dt end style

where the symbols have their usual meaning.

Asked by Topperlearning User | 6th Jul, 2015, 04:46: PM

Expert Answer:

The negative sign signifies that the induced emf always opposes any change in the magnetic flux.

Answered by  | 6th Jul, 2015, 06:46: PM