MCQ
One curie is equal to:
- ✓$3.7 \times 10^{10}$ Disintegration$/ \sec.$
- B$3.2 \times 10^8$ Disintegration$/ \sec.$
- C$2.8 \times 10^{10}$ Disintegration$/ \sec.$
- DNone of these.
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.


$\overrightarrow{\mathrm{E}}_{1}=\mathrm{E}_{0} \hat{\mathrm{j}} \cos (\omega \mathrm{t}-\mathrm{kx})$ and
$\overrightarrow{\mathrm{E}}_{2}=\mathrm{E}_{0} \hat{\mathrm{k}} \cos (\omega \mathrm{t}-\mathrm{ky})$
At $t=0,$ a particle of charge $q$ is at origin with a velocity $\overrightarrow{\mathrm{v}}=0.8 \mathrm{c} \hat{\mathrm{j}}$ ($c$ is the speed of light in vacuum). The instantaneous force experienced by the particle is
(If initial charge is $q_{0}$ )