Question

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 $\oint E.dl=\frac{d{\varphi }_B}{dt}$

Answer 1

Answer: (C)

An electromagnetic wave is that type of wave which is radiated by an accelerated charge and which propagates through space as coupled electric and magnetic field. These fields are oscillating perpendicular to each other. Hence, the option (c) is wrong.