- Determine the following quantities for each of the two circuits shown below …
- the equivalent resistance,
- the total current from the power supply,
- the current through each resistor,
- the voltage drop across each resistor, and
- the power dissipated in each resistor.

- A kitchen in North America has three appliances connected to a 120 V circuit with a 15 A circuit breaker: an 850 W coffee maker, a 1200 W microwave oven, and a 900 W toaster.
- Draw a schematic diagram of this circuit.
- Which of these appliances can be operated simultaneously without tripping the circuit breaker?

- The diagram below shows a circuit with one battery and 10 resistors; 5 on the left and 5 on the right. Determine …
- the current through,
- the voltage drop across, and
- the power dissipated by each resistor.

- Given the circuit below …
- Calculate the equivalent resistance of the circuit.
- Calculate the current through the battery.
- Graph voltage as a function of location on the circuit assuming that
*V*_{a}= 0 V at the negative terminal of the battery. - Graph current as a function of location on the circuit.

- What happens to the total current as resistors are added to a circuit …
- in series?
- In parallel?

- State two reasons why household outlets are not wired together in series.
- What is meant by the term "short circuit"? What makes a short circuit dangerous?
- A power source and four identical, numbered light bulbs are connected together as shown in the circuit to the right.
- Rank the light bulbs in order of decreasing brightness.
- Describe the effect that removing any one of the light bulbs has (if any) on the brightness of the other three.
- remove bulb 1
- remove bulb 2
- remove bulb 3
- remove bulb 4

Compile your answers to this question in a table like this one.

R _{1}R _{2}R _{3}R _{4}a. b. i. × b. ii. × b. iii. × b. iv. × - A power source and four identical, numbered light bulbs are connected together as shown in the circuit below.
- Rank the light bulbs in order of decreasing brightness.
- Describe the effect that removing any one of the light bulbs has (if any) on the brightness of the other three.
- remove bulb 1
- remove bulb 2
- remove bulb 3
- remove bulb 4

Compile your answers to this question in a table like this one.

R _{1}R _{2}R _{3}R _{4}a. b. i. × b. ii. × b. iii. × b. iv. ×

- Given the circuit below, find …
- the voltage drop across the 4 Ω resistor,
- the voltage drop across the 5 Ω resistor,
- the current through the 2 Ω resistor, and
- the current through the 7 Ω resistor.

- Given the circuit below, determine …
- the equivalent resistance of the entire circuit,
- the total current from the power supply,
- the current through each resistor, and
- the voltage drop across each resistor.

- Four identical resistors are combined in four different ways as shown in the diagram below [slide]. For the sake of convenience, let each have a resistance of 1 Ω. The + and – signs show the terminals of each combination.
- Which combination is strictly parallel? Determine its total resistance.
- Which combination is strictly series? Determine its total resistance.
- Which of the two combinations you analyzed in parts a. and b. has the lower resistance? Why does it have the lower resistance?
- Determine the equivalent resistance of the two remaining combinations.
- Which of the two combinations you analyzed in part d. has the lower resistance? Why does it have the lower resistance?

- The circuit below consists of eleven identical 1 Ω resistors connected to a 15 V power supply. Determine …
- the total resistance of the entire circuit,
- the total current from the power supply,
- the current through resistor
*R*_{1}, - the current through resistor
*R*_{2}, and - the current through resistor
*R*_{3}.

- Twelve identical 1 Ω resistors are connected into a circuit that consists of two square loops as show in the diagram below. Determine the resistance between the following pairs of points …
- b & g
- d & g

- f & g
- a & g

- a & h
- d & h

- g & h
- f & h