A proton is moving along negative X axis. If a uniform magnetic field is applied parallel to the positive Z axis, then choose the correct answer from the following options; 1. The proton will experience magnetic force along positive Y direction and will move along a circular path in the XY plane 2. The proton will experience magnetic force along negative Y direction and will move along a circular path in the XY plane

Step-by-step solution

Velocity of the proton, v = -v i Magnetic field, B = B k Charge of the proton, q = +e The magnetic force experienced by the proton is given by F = q( v B ) Substituting the values, F = e(-v i B k ) = -ev( i k ) Since i k = - j , we get F = ev j The magnetic force is along the positive Y direction. Since the velocity and force both lie in the XY plane and the magnetic field is perpendicular to it, the proton will move along a circular path in the XY plane. Answer: 1