Chapter 7 Review Name: ______________ Block: ___

1. What is the difference between a series circuit and a parallel circuit? Include a sketch in your answer.

2. Draw a schematic diagram of:

a) a circuit containing a three-cell battery, two light bulbs, a resistor, and a switch, all connected in series.

b) A circuit containing two lightbulbs connected in parallel, with a two-cell battery as its power source. Include switches that would turn both lights off at the same time.

c) A circuit containing three light bulbs, one which is more bright than the other two. Include a switch that will turn off only the two dimmer bulbs, and two cells connected in parallel

3. What is the difference between a cell and a battery?

4. What would happen to the current in a circuit if the voltage of the battery doubles?

(doubles)

5. What would happen to the power in a circuit if both the current and the resistance double?

(increases by 8x)

6. What current flows through a light bulb with 144 of resistance, if it is attached to a 120 V power source?

(0.83 A)

7. If a 10 A current flows through a 3 resistor, what is the voltage drop across the resistor?

(30V)

8. Your car’s battery is a 12 V DC source. A fuse in the dashboard causes the circuit to break if there is a surge greater than 5.0 A. What resistance if that fuse protecting?

(2.4)

9. A flashlight runs 2 D-Cells of 1.5 V each in series. The bulb is rated at 0.7 A. What is its resistance?

(4)

10.A 900W electric stove is connected to a 220 V outlet. How much current will it draw?

(4A)

11.A 2.0W lightbulb has a resistance of 3.3. What current is running through it?

(0.78A)

12. If a space heater produces 5400kJ of heat in 1.2 hours while plugged into a 110V outlet, how much current is flowing through the heater’s element?

(11A)

13.Summarize the following relationships for a series and parallel circuit:

Type of Circuit Series Circuit Parallel CircuitSchematic

Potential Difference

Current

Resistance

14. In this circuit, three resistors receive the same amount of current from a single source. a) the current in the circuit. Calculate:b) the amount of voltage “dropped” by each resistorc) the amount of power dissipated by each resistor:

( a) 4A; b) 4V, 8V, 16V; c) 16W; 32W; 48W)

15. In this circuit, three resistors receive the same amount of voltage (24 volts) from a single source. Calculate:

a) The equivalent resistor for the three resistors;b) The total current coming out of the battery; c) the amount of current “drawn” by each resistor;

( a) 0.59; b) 41A;

c) 24A, 12A, 4.8A)

16.Resolve the following Circuits:

a)

b)

c)

d)

e) *Challenge