Physics

Problem

Two singly ionised particles

P

and

Q

have masses

2m

and

3m

, respectively. They move in the same uniform magnetic field with their velocities perpendicular to the field. If the radii of their circular paths are

4\,\text{cm}

for

P

and

5\,\text{cm}

for

Q

, what is the ratio

\dfrac{K_P}{K_Q}

of their kinetic energies? a)

\dfrac{6}{5}

\dfrac{24}{25}

\dfrac{25}{24}

\dfrac{16}{25}

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