AP EAMCET · PHYSICS · Electromagnetic Waves
A plane electromagnetic wave of frequency 25 MHz propagates in vaccum along positive x -direction. At a particular point in space and time, if the electric field is \(6.3 \hat{\mathrm{j}} \mathrm{Vm}^{-1}\), then the magnitude of the magnetic field of the wave at this point at the same time is
- A \(2.1 \times 10^{-8} \mathrm{~T}\)
- B \(4.2 \times 10^{-8} \mathrm{~T}\)
- C \(6.3 \times 10^{-8} \mathrm{~T}\)
- D \(8.4 \times 10^{-8} \mathrm{~T}\)
Answer & Solution
Correct Answer
(A) \(2.1 \times 10^{-8} \mathrm{~T}\)
Step-by-step Solution
Detailed explanation
\(B = \frac{E}{c}\) \(B = \frac{6.3}{3 \times 10^8}\) \(B = 2.1 \times 10^{-8} \mathrm{~T}\)
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