Question 34
MagnetismA magnetic field is said to exist at a point if a force is
- A.exerted on a stationary charge at the point
- B.exerted on a moving charge at the point
- C.deflected at the point
- D.strengthened at the point.
Show the answer and explanation
Answer: B (exerted on a moving charge at the point)
Explanation
A magnetic field acts only on moving charges (or currents); a stationary charge feels no magnetic force.