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An electron (mass =9.1xx10^(-31)kg, char...

An electron (mass `=9.1xx10^(-31)kg`, charge `=1.6xx10^(-19)C`) experiences no deflection if subjected to an electric field of `3.2x10^(5)V/m`, and a magnetic fields of `2.0xx10^(-3)Wb/m^(2)`. Both the fields are normal to the path of electron and to each other. If the electric field is removed, then the electron will revolve in an orbit of radius

A

`45m`

B

`4.5m`

C

`0.45m`

D

`0.045m`

Text Solution

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The correct Answer is:
C
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