Problem

If the instantaneous magnetic flux and induced emf produced in a coil is

\phi

and

E

respectively, then according to Faraday's law of electromagnetic induction a.

E

must be zero if

\phi = 0

E \neq 0

\phi = 0

E \neq 0

but

\phi

may or may not be zero d.

E = 0

then

\phi

must be zero