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A proton is moving with a uniform veloci...

A proton is moving with a uniform velocity of `10^6 m s^(-1)` along the Y-axis, under the joint action of a magnetic field along Z-axis and an electric field of magnitude `2 xx 10^(4) V m^(-1)` along the negative X-axis. If the electric field is switched off, the proton starts moving in a circle. The radius of the circle is nearly (given `e/m` ratio for proton `= 10^8 C kg^(-1))`

A

0.5 m

B

0.2 m

C

0.1 m

D

0.05 m

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The correct Answer is:
A
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