Discussion Forum



1)

Pick out the wrong statement


A) Gauss's law of magnetism is given by $\alpha\oint B.ds=0$

B) An EM wave is a wave radiated by a charge at rest and propagates through electric field only

C) A time varying electric field is a source of changing magnetic field

D) Faraday's law of EM induction is $\oint E.dl=-\frac{d\phi_{B}}{dt}$

Answer:

Option C

Explanation:

An electromagnetic wave is the wave radiated by an accelerated charge and propagates through space as coupled electric and magnetic field. These fields are oscillating  perpendicular to each other