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An electron has mass 9xx10^(-31)kg and c...

An electron has mass `9xx10^(-31)kg` and change `1.6xx10^(-19)C` is moving with a velocity of `10^(6)m//s`, enters a region where magnetic field exists. If it describes a circle of radius `0.10m`, the intensity of magnetic field must be

A

`4.5xx10^-5T`

B

`1.4xx10^-5T`

C

`5.5xx10^-5T`

D

`2.6xx10^-5T`.

Text Solution

Verified by Experts

The correct Answer is:
C
`r=(mv)/(Be)thetefore r prop v (r_2)/(r_1)=(v_2)/(v_1)`
`r_2=2xx2=4cm`
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