JEE Mains · Physics · STD 12 - 4. Moving charges and magnetism
A charge \(Q\) is moving \(\overrightarrow{dl}\) distance in the magnetic field \(\overrightarrow{ B }\). Find the value of work done by \(\overrightarrow{ B }\).
- A \(1\)
- B Infinite
- C \(0\)
- D \(-1\)
Answer & Solution
Correct Answer
(C) \(0\)
Step-by-step Solution
Detailed explanation
Since force on a point charge by magnetic field is always perpendicular to \(\overrightarrow{ v }[\overrightarrow{ F }= q \overrightarrow{ V } \times \overrightarrow{ B }]\) \(\therefore\) Work by magnetic force on the point charge is zero.
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