Question

A charged particle moves along the axis of a current carrying solenoid. It experiences

• A. an accelerating force
• B. a retarding force
• C. a radial force
• D. no force

Answer 1

Answer: (D)

Inside a solenoid, magnetic field is along axis. The force on moving charged particle in magnetic field, F = qvB sin $\theta$ Particle is moving in direction of magnetic field. $\therefore$ $\theta =0{}^{\circ }$ $\therefore$ $F=0$ $\{\because sin0{}^{\circ }=0\}$