Answer: circular.
- A circular
- B straight
- C parabolic
- D elliptical
Correct answer: A. circular
Explanation: The constant perpendicular force provides centripetal force, giving a circular path.
The magnetic field around a long straight current-carrying wire forms concentric circles, with direction given by the right-hand rule (point thumb along I, fingers curl in the direction of B).
Concept context
Magnetic force on moving charges and currents, the Biot-Savart law, Ampere's law, and the cyclotron - how electric currents create and respond to magnetic fields.