Question

A charge of 5 μC moves with a speed of $2 \times 10^6$ m/s along the positive y-axis. A magnetic field $\vec{B}$ of strength ($2\hat{i}+ \hat{k}$)T exists in space. The magnetic force acting on the charge is :

• A. $(-20\hat{k} + 10\hat{i})$N
• B. $(20\hat{k}-10\hat{i})$N
• C. $(20\hat{i} +10\hat{i})$N
• D. $(10\hat{i} +5\hat{k})$N

Answer 1

Answer: (A)

$(-20\hat{k} + 10\hat{i})$N

Answer 2

The correct option is (A): $(-20\hat{k} + 10\hat{i})$N