1. Pew Pow
Think about the differences between a series circuit and a parallel circuit and explain which method is used to wire your house. Show a formula and give a good reason why you believe this to be true.

2. Objectives
Using our knowledge of Ohm’s Law and the Power Law, practice with Series Circuits !
Now apply our physics understanding to solve parallel circuits for things like voltage, current and resistance.

3. Homework: Castle Learning – Review TEST !! - Tomorrow (Thursday!)
(Friday if delay or snow day)
- on all of Current Electricity (Packet)

4. Finish Parallel Worksheet
Homework Review
Go through packet examples.
Resistance
Resistivity
Current
Ohm’s Law
Power Law
Series and Parallel Circuits
Then review questions.

5. Try this: (show all units!)
The current in a wire is 8.0 amperes. The time required for 2.5 × 1019 electrons to pass a certain point in the wire is…

6. Show all work
An electric dryer consumes 6.0 × 106 joules of electrical energy when operating at 220 volts for 1.8 × 103 seconds. During operation, the dryer draws a current of…

7. The diagram below shows currents in a segment of an electric circuit.
What is the reading of ammeter A?

8. The following resistors are placed in parallel: 10 ohms, 15 ohms, 6 ohms and 20 ohms. Draw the circuit and show how you would measure the current through the 15 ohm resistor. These are connected to a 120V power source. What is the equivalent resistance?

9. Recall
series circuit – a circuit in which two or more elements are connected end-to-end so that a single loop of current is formed.

10. Definitions
parallel circuit – a circuit in which two or more elements are connected so that each has its own current loop.

11. Worksheet

12. Draw a series circuit out of a 50 ohm resistor and a 100 ohm resistor and a 200 ohm resistor and a 20V battery. What is the current through the 100 ohm resistor?
What is the voltage drop across the 200 ohm resistor?
Now do the same thing but make a parallel circuit.