1. Solving for current, resistance and voltage in circuits

2. Calculating Resistance in a Circuit Resistance in circuits is based upon the type of circuits  Series Circuits 1260 Ω 175 Ω 260 Ω 350 Ω To calculate equivalent resistance in a series circuit, simply add all the resistors together R eq = R 1 + R 2 + R 3 + …

3. Calculating Resistance in a Circuit Resistance in circuits is based upon the type of circuits  Parallel 250 Ω 650 Ω150 Ω

4. Series Parallel Steps for solving circuits

5. Calculating Everything Else Finish calculating everything else in the circuit. The battery gives a voltage of 12 V. 1260 Ω 175 Ω 260 Ω 350 Ω 1.Find the equivalent resistance. 2.Find the total current. 3.Find the voltage drop across the 350 ohm resistor. 4.Find the voltage drop across the 1260 ohm resistor. 5.Find the voltage drop across the 175 ohm resistor. 6.Find the voltage drop across the 260 ohm resistor. 7.Verify that the total voltage provided by the battery is equal to the sum of the voltage drops across each resistor.

6. Calculating Everything Else Finish calculating everything else in the circuit. The battery gives a voltage of 12 V. 250 Ω 650 Ω150 Ω 1.Find the equivalent resistance. 2.Find the total current. 3.Find the current across the 250 ohm resistor. 4.Find the current across the 650 ohm resistor. 5.Find the current across the 150 ohm resistor. 6.Verify that the total current out of the battery is equal to the sum of all the currents across each resistor.

7. Fix KC #3 How does overall equivalent resistance compare between a series and parallel circuit? What does this change in overall equivalent resistance mean for the current in the circuit?

8. Practice pg 640 #1 + 2 pg 644 Read sample problem B, then complete #1 and #3 on pg 645