Review Multiple Choice Identify the letter of the choice that best completes the statement or answers the question. 1. When more devices are added to a series circuit, the total circuit resistance: a. decreases. b. increases. c. stays the same. d. may increase or decrease, depending on the device. 2. The voltage drop across each resistor in the circuit below is volts. a. 1.5 b. 3 c. 2 d. 9 3. The current in a series circuit: a. decreases to zero as it travels through the circuit. b. is the same at all points in a circuit. c. is greatest in the resistor with the highest resistance. d. is greatest in the resistor with the lowest resistance. 4. A student connects six 3-ohm light bulbs in series to a 9-volt battery. The total circuit current is ampere(s). a. 0.5 b. 2 c. 4.5 d. 18 Study the circuit diagrams shown below (all bulbs are identical):
Figure 14-2A 5. Which of the circuit diagrams shown in Figure 14-2A is a series circuit? a. I only b. II only c. III only d. I and II only 6. Which of the circuit diagrams shown in Figure 14-2A is a parallel circuit? a. I only b. II only c. III only d. I and II only 7. When a new branch containing a resistor is added to a parallel circuit, the total circuit resistance: a. decreases. b. increases. c. stays the same. d. may increase or decrease, depending on the device. 8. What is the basic difference between series and parallel circuits? a. Simple series circuits are not used in electrical devices; parallel circuits are used in all electrical devices. b. In a series circuit, there are multiple paths for the flow of charge; in a parallel circuit, there are only two paths. c. A series circuit contains one path for the flow of charge; a parallel circuit contains more than one path. d. A series circuit obeys Ohm s law; a parallel circuit does not obey Ohm s law. 9. A lamp has a short circuit. Which of the following statements best describes the lamp s circuit? a. The circuit is drawing a large amount of current. b. The circuit has a path of very low resistance. c. The lamp will not turn on. d. All of the above 10. The voltage across the 1-ohm resistor pictured below is volt(s).
1 / 3 a. b. 2 / 3 c. 1 d. 3 11. A student connects three 1-ohm light bulbs to a 9-volt battery in parallel. The total circuit current is ampere(s). a. 1 b. 3 c. 9 d. 27 12. Which of the following would create a total resistance of 0.5 ohm? a. Four 2-ohm resistors connected in parallel b. Four 2-ohm resistors connected in series c. Eight 2-ohm resistors connected in parallel d. Two 2-ohm resistors connected in series 13. As the distance between two positively charged objects increases, the force between them: a. increases. b. decreases. c. cannot be determined. d. remains the same. 14. The electric force between a 5-coulomb charge and a 1-coulomb charge 9,000 meters apart is: a. 5,000,000 newtons. b. 666 newtons. c. 556 newtons. d. 0.000556 newtons. 15. If the distance between two charges is reduced by half, the electric force between them: a. decreases by 1 / 2. b. decreases by 1 / 4. c. increases by 2 times. d. increases by 4 times. 16. A capacitor can be charged by: a. a resistor. b. a battery. c. wires. d. an ammeter. 17. A capacitor is a device that: a. charges electrons. b. charges protons.
c. stores electrical energy. d. stores chemical energy. 18. When a capacitor is discharged: a. it creates a current until all its stored energy has been converted. b. the current it creates decreases over time. c. electrons move from the negative plate to the positive plate until both plates are neutral. d. All of the above
Review Answer Section MULTIPLE CHOICE 1. ANS: B DIF: basic REF: section 14.1 2. ANS: B DIF: intermediate REF: section 14.1 3. ANS: B DIF: intermediate REF: section 14.1 4. ANS: A DIF: intermediate REF: section 14.1 5. ANS: C DIF: basic REF: section 14.1, section 14.2 6. ANS: D DIF: basic REF: section 14.1, section 14.2 7. ANS: A DIF: basic REF: section 14.2 8. ANS: C DIF: basic REF: section 14.2 9. ANS: D DIF: intermediate REF: section 14.2 10. ANS: D DIF: intermediate REF: section 14.2 11. ANS: D DIF: advanced REF: section 14.2 12. ANS: A DIF: advanced REF: section 14.2 13. ANS: B DIF: intermediate REF: section 15.1 14. ANS: C DIF: intermediate REF: section 15.1 15. ANS: D DIF: intermediate REF: section 15.1 16. ANS: B DIF: basic REF: section 15.3 17. ANS: C DIF: intermediate REF: section 15.3 18. ANS: D DIF: intermediate REF: section 15.3