1. Ohm’s Law Aim: How does voltage and resistance affect current flow?

2. Ohm’s Law The amount of current through a conductor is directly proportional to the potential difference but inversely proportional to the resistance Resistance Units: Ohms (Ω) Voltage Units: Volts (V) Current Units: Amps (A)

3. Georg Simon Ohm March 16 th 1789 – July 6 th 1854 Used Volta’s new electrochemical cell to conduct his research Teacher/Professor

4. Example #1 The voltage supplied to a circuit with a resistance of 100 ohms is 25 volts. How much current will flow in this circuit?

5. Example #2 2 amperes of current flow through a circuit with a resistance of 10 ohms. What is the voltage supplied to the circuit?

6. Example #3 A 9 volt battery is connected to a circuit, allowing 5 amperes of current flow. Calculate the resistance of the circuit.

7. SUMMARY What is the equation for Ohm’s Law? How does voltage affect current? How does resistance affect current?