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When proton of KE = 1.0 MeV moving in So...

When proton of KE = 1.0 MeV moving in South to North direction enters the magnetic field (from West to East direction), it accelerates with `a = 10^(12) m/s^2` . The magnitude of magnetic field is-

A

0.71mT

B

71mT

C

7.1mT

D

0.071mT

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