Answer: 1.6 × 10-13 N.
- A 3.2 × 10-13 N
- B 1.6 × 10-13 N
- C 0.8 × 10-13 N
- D 1.6 × 10-19 N
Correct answer: B. 1.6 × 10-13 N
Explanation: F = qvB = 1.6 × 10-19 × 2 × 106 × 0.5 = 1.6 × 10-13 N.
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.