JEE Mains · Physics · STD 12 - 8. Electromagnetic waves
An electromagnetic wave travels in free space along the \(x\)-direction. At a particular point in space and time, \(\vec{B} = 2 \times 10^{-7} \hat{j}\) T is associated with this wave. The value of corresponding electric field \(\vec{E}\) at this point is _______ V/m.
- A \(60 \hat{k}\)
- B \(-60 \hat{k}\)
- C \(30 \hat{k}\)
- D \(-600 \hat{k}\)
Answer & Solution
Correct Answer
(B) \(-60 \hat{k}\)
Step-by-step Solution
Detailed explanation
The direction of propagation of an electromagnetic wave is given by the direction of \(\vec{E} \times \vec{B}\). Given that the wave travels along the \(x\)-direction, the direction of propagation is \(\hat{i}\). The magnetic field is given as…
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