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One proton beam enters a magnetic field ...

One proton beam enters a magnetic field of `10^(-4) T` normally. Specific charge `=10^(11)C//kg`. Velocity `=10^(7)m//s`. What is the radius of the circle described by it

A

`0.1m`

B

`1m`

C

`10m`

D

None of these

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The correct Answer is:
B
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ERRORLESS -MAGNETIC EFFECT OF CURRENT-Exercise
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