Question

A particle of charge $q$ and mass $m$ moves in a clockwise circular path of radius $r$ in a uniform magnetic field $B$ at a speed $v$. The particle is replaced with a particle of identical mass and charge $q$, moving at speed $v$.
The radius and direction of the new circular path the particle makes is:

• A. $\frac{1}{2}r$, clockwise
• B. $\frac{1}{2}r$, counter-clockwise
• C. $r$, clockwise
• D. $r$, counter-clockwise
• E. $2r$ clockwise

Answer 1

The correct option is D $r$, counter-clockwise

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