AP EAMCET · PHYSICS · Electromagnetic Waves
The amplitude of electric field in an electromagnetic wave is \(60 \mathrm{Vm}^{-1}\). Then the amplitude of magnetic field is
- A \(2 \times 10^{-7} \mathrm{~T}\)
- B \(2 \times 10^7 \mathrm{~T}\)
- C \(6 \times 10^7 \mathrm{~T}\)
- D \(6 \times 10^{-7} \mathrm{~T}\)
Answer & Solution
Correct Answer
(A) \(2 \times 10^{-7} \mathrm{~T}\)
Step-by-step Solution
Detailed explanation
\(\begin{aligned} & B_0=\frac{E_0}{c} \quad\left[\because c=3 \times 10^8 \mathrm{~m} / \mathrm{s}\right] \\ & =\frac{60}{3 \times 10^8}=20 \times 10^{-8}=2 \times 10^{-7} \mathrm{~T}\end{aligned}\)
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