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An electron beam in a TV picture tube is...

An electron beam in a TV picture tube is accelerated through a potential difference of V Volts. It passes through a region of transverse magnetic induction field (B) and follows a circular orbit of radius 'r'. The magnetic field (B) is

A

` ( 2mV )/( sqrt(e r))`

B

`sqrt(( 2mv )/(e r ^2))`

C

`sqrt((2mV )/(r ))`

D

`sqrt((2m Vr)/(e ))`

Text Solution

Verified by Experts

The correct Answer is:
B
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