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AP® Physics C: E & M

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Moderate

Affect of Changing Mass on Circular Paths

APPHEM-SUJAVA

A particle of charge $\mathit{q}$ and mass $\mathit{m}$ moves in a circular path of radius $\mathit{r}$ in a uniform magnetic field $\mathit{B}$.

The particle is replaced with a particle of identical charge and mass $\mathit{\frac{1}{2}m}$.

The radius of the new circular path the particle makes is:

A

$\mathit{\frac{1}{4}r}$

B

$\mathit{\frac{1}{2}r}$

C

$\mathit{r}$

D

$\mathit{2r}$

E

$\mathit{4r}$