Magnetic Effects & Magnetism

JEE Main level, single correct, medium

180 of 276

Question 180 of 276

A particle of mass MM and charge Q moving with velocity v→\overrightarrow{\mathrm{v}} describe a circular path of radius R\mathrm{R} when subjected to a uniform transverse magnetic field of induction B\mathrm{B}. The work done by the field when the particle completes one full circle is

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Answer: (B) Zero

Force is ⊥r\perp^{\mathrm{r}} to displacement ⇒\Rightarrow the work done is zero

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