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A beam of well collimated cathode rays t...

A beam of well collimated cathode rays travelling with a speed of `5xx10^(6)ms^(-1)` enter a region of mutually perpendicular electric and magnetic fields and emerge undeviated from this region. If `|B|=0.02t`, the magnitude of the electric field is

A

`10^(5)Vm^(-1)`

B

`2.5xx10^(8)Vm^(-1)`

C

`1.25xx10^(10)Vm^(-1)`

D

`2xx10^(3)Vm^(-1)`

Text Solution

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The correct Answer is:
A
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