An electron is constrained to move along the with ...| EMI

JEE MAIN 2020

05-09-2020 S1

Question

An electron is constrained to move along the $y$-axis with a speed of 0.1 c ( c is the speed of light) in the presence of electromagnetic wave, whose electric field is $\vec{E}=30 \mathrm{j} \sin \left(1.5 \times 10^7 \mathrm{t}-5 \times 10^{-2} \mathrm{x}\right) \mathrm{V} / \mathrm{m}$. The maximum magnetic force experienced by the electron will be (given $\mathrm{c}=3 \times 10^8 \mathrm{~ms}^{-1}$ and electron charge $=1.6 \times 10-19 \mathrm{C}$ )

Select the correct option:

$4.8 \times 10^{-19} \mathrm{~N}$

$2.4 \times 10^{-18} \mathrm{~N}$

$3.2 \times 10^{-18} \mathrm{~N}$

$1.6 \times 10^{-19} \mathrm{~N}$

✓ Correct! Well done.

✗ Incorrect. Try again or view the solution.

Solution