Two protons are moving with same velocity in magnetic field of same magnitude, then --a)Magnetic force on protons may be zerob)Magnetic force on both must be samec)Magnetic force on both may or may not be samed) both (a) and (c) are correct.The correct answer is (d).I can't understand how the stat (a) is true.Please let me know

Dear nitin,

a) statement is true and magnetic force can be zero that depends on the direction of velocity and magnetic field.

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option d is correct because force depends on angle  so force can be zero as well as different for diff angles

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f= q(v*b) thats =qvbsino =0..................................... so it should be zero.....  if you like my answer then approve it....................

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