What is Ohm's Law and how does it work?

What is Ohm's Law and how does it work?

Ohm's Law states that the current through a conductor between two points is directly proportional to the voltage across the two points. It can be expressed with the formula V = IR, where V is voltage, I is current, and R is resistance.

Can you give me an example of how to use Ohm's Law?

Sure! If you have a circuit with a voltage of 12 volts and a resistance of 4 ohms, you can calculate the current using Ohm's Law: I = V/R, which gives you I = 12V / 4Ω = 3A.

What happens if I increase the resistance?

If you increase the resistance while keeping the voltage constant, the current will decrease. This is because, according to Ohm's Law, current is inversely proportional to resistance.

Are there any exceptions to Ohm's Law?

Yes, Ohm's Law applies to ohmic materials, where the relationship between voltage and current is linear. Non-ohmic materials, like diodes, do not follow this law.