Essay questions for electricity and magnetism

by Quirino Sugon Jr.

1. Why do auroras or northern lights occur? Hint: magnetic force on charges
2. Why are the wires of plugs tied together? Hint: Ampere’s law.
3. Why is iron attracted to magnets? Hint: magnetic domains.
4. How does a metal detector work? Hint: magnetic induction and eddy currents.
5. How do some birds and fishes know where the North Pole is?
6. Compare and contrast electric and magnetic forces.
7. State Gauss’s Law
8. State Ampere’s Law
9. State Faraday’s Law