(1) What is the resistance of a toaster that uses 4.00 A on a 110 V line? (1 mark) a. 27.5 Ω b. 55.0 Ω c. 110 Ω d. 440 Ω
(2) A student needs to connect the voltmeter to measure the voltage drop across the parallel resistors as shown below. Across which two connection points should the student connect the voltmeter? (1 mark) a. U and Z b. X and Y c. X and W d. W and Z
(3) What is the terminal voltage of the battery in the circuit shown below?
(1 mark) a. 0.69 V b. 5.3 V c. 6.0 V d. 6.7 V
(4) Four identical resistors, each of value R , are arranged in four combinations as shown below. Which one of these arrangements will result in the least total resistance?
(1 marks) a. b. c. d.

(5) The following diagram shows part of a compete circuit. What is the power dissipated in one of the 20 Ω resistors? (2 marks) a. 16 W b. 25 W c. 33 W d. 99 W
(6) In the circuit below, the current through the 3.0 Ω resistor is 1.0 A. What is the current through the 9.0 Ω resistor? (2 marks) a. 1.0 A b. 1.5 A c. 2.0 A d. 3.0 A
(7) What current flows through the 4.00 Ω resistor in the following circuit? (2 marks) a. 0.47 A b. 1.2 A c. 1.3 A d. 1.5 A
(8) A potential difference of 12 V causes 0.35 C of electric charge to pass through a resistor in 2.6 s. What power does the resistor dissipate? (1 mark) a. 1.6 W b. 4.2 W c. 11 W d. 89 W
(9) The headlights in a car use 95 W of power. A driver parks her car but leaves the lights on. The 12 V battery has 3.4 x 10
5
C of stored charge. How long does it take for the battery to lose its charge? (2 marks) a. 1100 s b. 3600 s c. 4.3 x 10
4 s d. 2.7 x 10
6 s

(10) Calculate the percent efficiency of the transmission of electric power if 30,000 W is shipped at 548 V over 5.0 Ω transmission lines. (2 marks) a. 1.1 % b. 10% c. 50% d. 90%
(11) Electricity is transmitted at high potential to: (1 mark) a. operate heavy equipment b. maximize current in the transmission lines c. minimize the energy lost as heat in the transmission lines d. produce alternating currents because they always require high voltages.
( 12) A voltmeter is connected across a 3.0 Ω resistor as shown.
What is the reading on the voltmeter? (2 marks) a. 4.0 V b. 6.0 V c. 8.0 V d. 12.0 V
(13) The dotted box in the diagram below indicates a battery with an internal resistance of 0.50 W and an emf of 3.00 V. If the current flowing is 0.25 A, what is the terminal voltage Vxy? (1 mark) a. 0.12 V b. 2.88 V c. 3.00 V d. 3.12 V
(14) A call has an internal resistance of 0.50 Ω. It has a terminal voltage of 1.4 V when connected to a 5.0 Ω external resistance. What will its terminal voltage be if the 5.0 Ω resistor is replaced by a 10.0 Ω resistor? a. 0.70 V b. 1.4 V c. 1.5 V d. 2.8 V

Part B: Written Questions.
Marks as Indicated
(1) The terminal voltage of the battery is 5.8 V. a) What is the current through the battery? (3 marks) b) What is the voltage drop across the 11 Ω resistor? (2 marks)
(2) The 8.0 Ω resistor in the circuit shown below dissipates 45 J of heat energy in 5.0 s. a) What is the current through the battery? (3 marks) b) Determine the value of the resistor R (2 marks)

BONUS (1 mark) A battery with an emf of 60 V and an internal resistance (r) is connected to a 10 Ω external resistance as shown in diagram 1. The power lost inside the battery is 50 W. The same battery is then connected to a 4.0 Ω resistance as indicated in diagram 2. The power lost inside the battery is then four times as great
(200 W). What is the internal resistance of the battery?