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Three paticles, an electron (e), a proton (p) and a helium atom (He) are moving in circular paths with constant speeds in the x-y plane in a region where a uniform magnetic field B exists along z-axis. The times taken by e, p and He inside the field to complete one revolution are `t_e, t_p and t_He` respectively. Then,

A

`t_(He)gtt_p=t_e`

B

`t_(He)gtt_pgtt_e`

C

`t_(He)=t_p=t_e`

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
b
`T=2pim//qB, (m/q)_(He)gt(m/q)_Pgt(m/q)_e`
`:. t_(He)gtt_(P)tgt_(e)`
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