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A light beam is described by \(\mathrm{E}=800\sin \omega \left(t-\frac{x}{c}\right)\)V/m. An electron is allowed to move…

Q1

A light beam is described by \(\mathrm{E}=800\sin \omega \left(t-\frac{x}{c}\right)\)V/m. An electron is allowed to move normal to the propagation of light beam with a speed of \(3\times {10}^{7}{\mathrm{ms}}^{-1}\). What is the maximum magnetic force exerted on the electron?

[JEE Main 2021, 26 Aug (Shift 2)]

a

\(1.28\times {10}^{-21}\mathrm{N}\)

b

\(1.28\times {10}^{-18}\mathrm{N}\)

c

\(12.8\times {10}^{-17}\mathrm{N}\)

d

\(12.8\times {10}^{-18}\mathrm{N}\)

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