A proton and an electron both moving with the same velocity v enter into a region of magnetic field directed perpendicular to the velocity of the part

A proton and an electron both moving with the same velocity v enter into a region of magnetic field directed perpendicular to the velocity of the part
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A proton and an electron both moving with the same velocity v enter into a region of magnetic field ... be higher D. their orbital radii will be same
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If a proton of mass m is moving with velocity of light, how will its mass? -Do You Know?

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