1. Chapter 16 Clickers DC Circuits Prepared by Dedra Demaree, Georgetown University © 2014 Pearson Education, Inc.

2. Voting question For current to flow, all of the following must be present EXCEPT: a)A charge conduction pathway. b)Free protons. c)A potential difference. d)Free electrons. © 2014 Pearson Education, Inc.

3. Voting question For current to flow, all of the following must be present EXCEPT: a)A charge conduction pathway. b)Free protons. c)A potential difference. d)Free electrons. © 2014 Pearson Education, Inc.

4. Voting question If there is a 2.0−A current through a wire for 20 seconds, what is the total charge that moved through the wire during this time interval? a)0.1 C b)4 C c)10 C d)40 C © 2014 Pearson Education, Inc.

5. Voting question If there is a 2.0−A current through a wire for 20 seconds, what is the total charge that moved through the wire during this time interval? a)0.1 C b)4 C c)10 C d)40 C © 2014 Pearson Education, Inc.

6. Voting question If 10 J of work is done by a battery to move 2 C of charge, what is the emf of the battery? a)2 V b)5 V c)10 V d)20 V © 2014 Pearson Education, Inc.

7. Voting question If 10 J of work is done by a battery to move 2 C of charge, what is the emf of the battery? a)2 V b)5 V c)10 V d)20 V © 2014 Pearson Education, Inc.

8. Voting question A closed circuit requires: a)At least two wires. b)Connection to one terminal of a battery. c)Connection to at least one device. d)None of the above is a requirement. © 2014 Pearson Education, Inc.

9. Voting question A closed circuit requires: a)At least two wires. b)Connection to one terminal of a battery. c)Connection to at least one device. d)None of the above is a requirement. © 2014 Pearson Education, Inc.

10. Voting question Ammeters must be connected: a)In parallel with the element whose current is being measured. b)In series with the element whose current is being measured. c)Either configuration will work. © 2014 Pearson Education, Inc.

11. Voting question Ammeters must be connected: a)In parallel with the element whose current is being measured. b)In series with the element whose current is being measured. c)Either configuration will work. © 2014 Pearson Education, Inc.

12. Voting question Voltmeters must be connected: a)In parallel with the element when the potential difference across the element is being measured. b)In series with the element when the potential difference across the element is being measured. c)Either configuration will work. © 2014 Pearson Education, Inc.

13. Voting question Voltmeters must be connected: a)In parallel with the element when the potential difference across the element is being measured. b)In series with the element when the potential difference across the element is being measured. c)Either configuration will work. © 2014 Pearson Education, Inc.

14. Voting question Which of the following statements is correct? a)Circuit elements with higher conductance require a smaller potential difference to have the same current. b)Circuit elements with higher resistance require a smaller potential difference to have the same current. c)Circuit elements with higher conductance require a larger potential difference to have the same current. d)None of the above is correct. © 2014 Pearson Education, Inc.

15. Voting question Which of the following statements is correct? a)Circuit elements with higher conductance require a smaller potential difference to have the same current. b)Circuit elements with higher resistance require a smaller potential difference to have the same current. c)Circuit elements with higher conductance require a larger potential difference to have the same current. d)None of the above is correct. © 2014 Pearson Education, Inc.

16. Voting question If the resistance in a circuit element is 3.0 ohms and the current is 1 A, what is the potential difference across the element? a)1/3 V b)1 V c)3 V d)None of the above © 2014 Pearson Education, Inc.

17. Voting question If the resistance in a circuit element is 3.0 ohms and the current is 1 A, what is the potential difference across the element? a)1/3 V b)1 V c)3 V d)None of the above © 2014 Pearson Education, Inc.

18. Voting question Which of the following statements is correct? a)An ohmic device has a linear relationship between potential difference and current. b)A diode is a non-ohmic device. c)Both A and B are correct. d)Neither A nor B is correct. © 2014 Pearson Education, Inc.

19. Voting question Which of the following statements is correct? a)An ohmic device has a linear relationship between potential difference and current. b)A diode is a non-ohmic device. c)Both A and B are correct. d)Neither A nor B is correct. © 2014 Pearson Education, Inc.

20. Voting question How will the brightness of bulb 1 compare before and after the switch next to bulb 3 is closed. a)The brightness will decrease. b)The brightness will be the same. c)The brightness will increase. d)It's impossible to determine from the given information. © 2014 Pearson Education, Inc.

21. Voting question How will the brightness of bulb 1 compare before and after the switch next to bulb 3 is closed. a)The brightness will decrease. b)The brightness will be the same. c)The brightness will increase. d)It's impossible to determine from the given information. © 2014 Pearson Education, Inc.

22. Voting question How will the brightness of bulb 2 and bulb 3 compare after the switch is closed? a)Bulb 2 will be brighter. b)They will have the same brightness. c)Bulb 3 will be brighter. d)It's impossible to determine from the given information. © 2014 Pearson Education, Inc.

23. Voting question How will the brightness of bulb 2 and bulb 3 compare after the switch is closed? a)Bulb 2 will be brighter. b)They will have the same brightness. c)Bulb 3 will be brighter. d)It's impossible to determine from the given information. © 2014 Pearson Education, Inc.

24. Voting question If the resistance of each bulb shown in the figure is 10 ohms and the emf of the battery is 15 V: a)The current in each bulb will be 1.5 A. b)The potential difference across each resistor will be 5 V. c)The first bulb will be brighter than the third bulb. d)None of the above is correct. © 2014 Pearson Education, Inc.

25. Voting question If the resistance of each bulb shown in the figure is 10 ohms and the emf of the battery is 15 V: a)The current in each bulb will be 1.5 A. b)The potential difference across each resistor will be 5 V. c)The first bulb will be brighter than the third bulb. d)None of the above is correct. © 2014 Pearson Education, Inc.

26. Voting question A 60−W light bulb has a 120−V potential difference across it. What is the current through the bulb? a)0.5 A b)2 A c)60 A d)120 A © 2014 Pearson Education, Inc.

27. Voting question A 60−W light bulb has a 120−V potential difference across it. What is the current through the bulb? a)0.5 A b)2 A c)60 A d)120 A © 2014 Pearson Education, Inc.

28. Voting question A 5-ohm resistor has a 10−V potential difference across it. How much power is dissipated by the resistor? a)5 W b)10 W c)20 W d)50 W © 2014 Pearson Education, Inc.

29. Voting question A 5-ohm resistor has a 10−V potential difference across it. How much power is dissipated by the resistor? a)5 W b)10 W c)20 W d)50 W © 2014 Pearson Education, Inc.

30. Voting question If you place a 100−W bulb and a 60−W bulb in a series circuit, which bulb will be brighter? a)The 60−W bulb b)The 100−W bulb c)They will have the same brightness in a series circuit because they have the same current. © 2014 Pearson Education, Inc.

31. Voting question If you place a 100−W bulb and a 60−W bulb in a series circuit, which bulb will be brighter? a)The 60−W bulb b)The 100−W bulb c)They will have the same brightness in a series circuit because they have the same current. © 2014 Pearson Education, Inc.

32. Voting question You connect a 30-ohm resistor to an unknown battery and measure the current through the resistor to be 0.2 A. What can you conclude about the emf of the battery? a)It is 0.2 V. b)It is 15 V. c)It is 30 V. d)It is 150 V. © 2014 Pearson Education, Inc.

33. Voting question You connect a 30-ohm resistor to an unknown battery and measure the current through the resistor to be 0.2 A. What can you conclude about the emf of the battery? a)It is 0.2 V. b)It is 15 V. c)It is 30 V. d)It is 150 V. © 2014 Pearson Education, Inc.

34. Voting question Kirchoff's junction rule is a consequence of: a)Conservation of momentum. b)Conservation of energy. c)Conservation of charge. d)None of the above. © 2014 Pearson Education, Inc.

35. Voting question Kirchoff's junction rule is a consequence of: a)Conservation of momentum. b)Conservation of energy. c)Conservation of charge. d)None of the above. © 2014 Pearson Education, Inc.

36. Voting question A 4-ohm resistor and a 2-ohm resistor are in series. What is the equivalent resistance of the two resistors arranged in series? a)0.5 ohm b)2 ohms c)6 ohms d)8 ohms © 2014 Pearson Education, Inc.

37. Voting question A 4-ohm resistor and a 2-ohm resistor are in series. What is the equivalent resistance of the two resistors arranged in series? a)0.5 ohm b)2 ohms c)6 ohms d)8 ohms © 2014 Pearson Education, Inc.

38. Voting question A 4-ohm resistor and a 2-ohm resistor are in parallel. What is the equivalent resistance of the two resistors arranged in parallel? a)0.5 ohm b)4/3 ohms c)2 ohms d)6 ohms © 2014 Pearson Education, Inc.

39. Voting question A 4-ohm resistor and a 2-ohm resistor are in parallel. What is the equivalent resistance of the two resistors arranged in parallel? a)0.5 ohm b)4/3 ohms c)2 ohms d)6 ohms © 2014 Pearson Education, Inc.

40. Voting question What is the equivalent resistance of the combination of resistors shown in the figure? a)2 ohms b)3 ohms c)4 ohms d)9 ohms © 2014 Pearson Education, Inc.

41. Voting question What is the equivalent resistance of the combination of resistors shown in the figure? a)2 ohms b)3 ohms c)4 ohms d)9 ohms © 2014 Pearson Education, Inc.

42. Voting question Electrical resistance decreases with: a)Resistivity. b)Length. c)Area. d)None of the above. © 2014 Pearson Education, Inc.

43. Voting question Electrical resistance decreases with: a)Resistivity. b)Length. c)Area. d)None of the above. © 2014 Pearson Education, Inc.