Two particles A and B having equal charg...

Two particles A and B having equal charges +6 C, after being accelerated through the same potential difference, enter a region of uniform magnetic field and describe circular paths of radii 2 cm and 3cm respecitevely. The ratio of mass A to that of B is

a. `4/9`

b. `9/5`

c. `1/2`

d. `1/3`

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