Question

A proton moves with a velocity of $5\times 10^6\hat{j}m{s}^{-1}$ through the uniform electric field, $\vec{E}=4\times 10^6[2\hat{i}+0.2\hat{j}+0.1\hat{k}]V{m}^{-1}$ and the uniform magnetic field $\vec{B}=0.2[\hat{i}+0.2\hat{j}+\hat{k}]T$. The approximate net force acting on the proton is

• A. $2.2\times 10^{-13}N$
• B. $20\times 10^{-13}N$
• C. $5\times 10^{-13}N$
• D. none

Answer 1

Answer: (D)

Correct answer is (d) none