JEE Mains · Physics · STD 12 - 8. Electromagnetic waves
The ratio of speeds of electromagnetic waves in vacuum and a medium, having dielectric constant k=3 and permeability \(\mu=2\mu_{0}\), is
( \(\mu_0=\) permeability of vacuum)
- A 36 : 1
- B 3 : 2
- C 6 : 1
- D \(\sqrt{6}:1\)
Answer & Solution
Correct Answer
(D) \(\sqrt{6}:1\)
Step-by-step Solution
Detailed explanation
\(\frac{ C }{ V }=\mu=\sqrt{\varepsilon_{ r } \mu_{ r }}\) \(\frac{C}{V}=\sqrt{\frac{3 \times 2}{1}}=\frac{\sqrt{6}}{1}\)
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