JEE Main 2015 Physics question
An electromagnetic wave travelling in the direction has frequency of Hz and electric field amplitude of V m oscillates in direction. From the options given below, which one describes the magnetic field for this wave?
Answer: (4)
Solution
Three things fix the answer. First the amplitude: T, which rules out option (3). Second the direction: must point along the direction of propagation, and since is along the magnetic field must be along
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