Given below are two statements: Statement I: A time varying electric field is a source of changing magnetic field and vice-versa. Thus a disturbance in electric or magnetic field creates EM waves. Statement II: In a material medium, the EM wave travels with speed v = (1)/(√(μ₀ ε₀)). In the light of the above statements, choose the correct answer from the options given below. (a) Both Statement I and Statement II are true (b) Both Statement I and Statement II are false (c) Statement I is correct but Statement II is false (d) Statement I is incorrect but Statement II is true

Answer: (c). Statement I: a changing E produces B (and vice versa), which is how EM waves form. True. Statement II: (1)/(√(μ₀ε₀)) = c is the speed in vacuum; in a medium v = (1)/(√(με)). False. So the answer is (c).

Given below are two statements: Statement I: A time varying electric… | JEE Main 2022 (27 Jun, Shift 2)

Q12JEE Main 2022 · 27 JUN · SHIFT 2Easy

Speed of EM Waves in a Medium

Given below are two statements:

Statement I: A time varying electric field is a source of changing magnetic field and vice-versa. Thus a disturbance in electric or magnetic field creates EM waves.

Statement II: In a material medium, the EM wave travels with speed $v = \frac{1}{\sqrt{\mu_0 \epsilon_0}}$ . In the light of the above statements, choose the correct answer from the options given below.

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Answer: (c)

Statement I: a changing $E$ produces $B$ (and vice versa), which is how EM waves form. True.
Statement II: $\dfrac{1}{\sqrt{\mu_0\epsilon_0}} = c$ is the speed in vacuum; in a medium $v = \dfrac{1}{\sqrt{\mu\epsilon}}$ . False.
So the answer is (c).

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Speed of EM Waves in a Medium question from JEE Main 2022 (27 Jun, Shift 2)

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