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 exist
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`.
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Correct Answer - C
`r=(mv)/(Be)thetefore r prop v (r_2)/(r_1)=(v_2)/(v_1)`
`r_2=2xx2=4cm`
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