- Home
- Standard 12
- Physics
Given below are two statements: One is labelled as Assertion $(A)$ and the other is labelled as Reason $(R).$
Assertion $(A)$ : In an uniform magnetic field, speed and energy remains the same for a moving charged particle.
Reason $(R)$ : Moving charged particle experiences magnetic force perpendicular to its direction of motion.
Both $(A)$ and $(R)$ are true and $(R)$ is the correct explanation of $( A )$
Both $(A)$ and $(R)$ are true but $(R)$ is NOT the correct explanation of $( A )$
$(A)$ is true but $(R)$ is false
$(A)$ is false but $(R)$ is true.
Solution
$\overrightarrow{ F }= q (\overrightarrow{ v } \times \overrightarrow{ B })$
$\overrightarrow{ F } \perp \overrightarrow{ V }$
Work done $=\overrightarrow{ F } \cdot \overrightarrow{ S }$
Work done $=0$
