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An alpha particle travels at an angle of...

An `alpha` particle travels at an angle of `30^(@)` to a magnetic field 0.8 T with a velocity of `10^(5)` m/s. The magnitude of force will be-

A

`1.28 xx 10^(14)` N

B

`(1.28)sqrt""3 xx 10^(-4)N`

C

`1.28 xx 10^(-4) N`

D

`(12.8 )sqrt""3xx10^(-4)N`

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