In an experiment, electrons are accelerated, from rest

JEE MAIN 2019

11-01-2019 S1

Question

In an experiment, electrons are accelerated, from rest, by applying a voltage of 500 V . Calculate the radius of the path if a magnetic field 100 mT is then applied. [Charge of the electron $=1.6 \times 10^{-19} \mathrm{C}$, Mass of the electron $\left.=9.1 \times 10^{-31} \mathrm{~kg}\right]$

Select the correct option:

$7.5 \times 10^{-3} \mathrm{~m}$

7.5 m

$7.5 \times 10^{-2} \mathrm{~m}$

$7.5 \times 10^{-4} \mathrm{~m}$

✓ Correct! Well done.

✗ Incorrect. Try again or view the solution.

Solution