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A doubly ionised He^(+2) atom travels at...

A doubly ionised `He^(+2)` atom travels at right angles to a magnetic field of induction `0.4T` with a velcoity of `10^(5)ms^(-1)` describing a circle of radius `r`. A proton travelling with same speed in same direction in the same field will describe a circle of radius.

A

r/4

B

r/2

C

r

D

2r

Text Solution

Verified by Experts

The correct Answer is:
B
`r = (mv)/(Bq)`
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