Electromagnetic Waves

JEE Main level, single correct, medium

114 of 165

Question 114 of 165

A plane electromagnetic wave of frequency 50MHz50MHz travels in free space along the positive xx - direction. At a particular point in space and time, E⃗=6.3j^V/m,\vec{E}=6.3\hat{j}V/m, The corresponding magnetic field B,⃗\vec{B,} at that point will be:

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Answer: (A) 2.1×10−8k^T2.1\times {10}^{-8}\hat{k}T

As we know EB=C\dfrac{E}{B}=C

E=6.3V/mE=6.3V/m

B=EC=6.33×108T=2.1×10−8TB=\dfrac{E}{C}=\dfrac{6.3}{3\times {10}^{8}}T=2.1\times {10}^{-8}T

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