Question

Define ohm's law. How are potential differences, current, and resistance related to each other?

Answer 1

1. Ohm's law states that the voltage across a conductor is directly proportional to the current flowing through it.
2. It states the relationship between electric current and potential difference. The current that flows through most conductors is directly proportional to the voltage applied to it. Georg Simon Ohm, a German physicist was the first to verify Ohm’s law experimentally.
3. If V is voltage I is current and R is resistance then V = I × R.
4. Ohm’s Law describes the current flow through a resistance when different electric potentials (voltage) are applied at each end of the resistance.
5. Since we can’t see electrons, the water-pipe analogy helps us understand the electric circuits better.
6. Water flowing through pipes is a good mechanical system that is analogous to an electrical circuit.