| 1. 1 pts. |
The diagram below shows a game where players try to move a metal needle through three metal paper clips without letting the needle touch the clips. A bulb lights when the needle touches a paper clip, signaling that the player has lost. Why does the bulb light when the needle touches a paper clip?
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| A. | Convection currents are started | ||
| B. | Vibrations set up wavelike disturbances | ||
| C. | A circuit is completed | ||
| D. | A state change occurs | ||
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| 2. 1 pts. |
Look at the circuit below. Both bulbs are identical. Bulb X would be
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| A. | dimmer than bulb Y | ||
| B. | brighter than bulb Y | ||
| C. | just as bright as bulb Y | ||
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| 3. 1 pts. |
Look at the circuit below. Both bulbs are identical. Bulb X is
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| A. | dimmer than bulb Y | ||
| B. | brighter than bulb Y | ||
| C. | just as bright as bulb Y | ||
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| 4. 1 pts. |
Two circuits were set up as shown below. All the bulbs in both circuits were identical. Comparing circuits 1 and 2, bulb X is
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| A. | dimmer than in circuit 1 | ||
| B. | brighter than in circuit 1 | ||
| C. | the same as in circuit 1 | ||
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| 5. 1 pts. |
Look at the circuit diagram below. The current at position S is 4A. The current at position T is 2A. What is the current at position P?
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| A. | 0A | ||
| B. | 2A | ||
| C. | 4A | ||
| D. | 6A | ||
| E. | 8A | ||
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| 6. 1 pts. |
Look at the circuit diagram below. The current at position S is 4A. The current at position T is 2A. What is the current at position R?
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| A. | 0A | ||
| B. | 2A | ||
| C. | 4A | ||
| D. | 6A | ||
| E. | 8A | ||
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| 7. 1 pts. |
Look at the circuit diagram below. The current at position S is 4A. The current at position T is 2A. What is the current at position Q?
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| A. | 0A | ||
| B. | 2A | ||
| C. | 4A | ||
| D. | 6A | ||
| E. | 8A | ||
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| 8. 1 pts. |
Look at the circuit diagram below. For bulb M to light up,
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| A. | only switch P must be closed | ||
| B. | only switch Q must be closed | ||
| C. | both switches must be closed | ||
| D. | neither switch need be closed | ||
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| 9. 1 pts. |
Look at the circuit diagram below. For bulb N to light up,
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| A. | only switch P must be closed | ||
| B. | only switch Q must be closed | ||
| C. | both switches must be closed | ||
| D. | neither switch need be closed | ||
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| 10. 1 pts. |
The lights in your home are wired | |
| A. | in parallel, so that if one fails the remainder stay on | |
| B. | in series, so that if one fails the remainder stay on | |
| C. | in parallel, so that if one fails all the lights go off | |
| D. | in series, so that if one fails all the lights go off | |
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| 11. 1 pts. |
In which of the following circuits does the voltmeter measure the voltage across bulb X? | ||
| A. |
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| B. |
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| C. |
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| D. |
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| 12. 1 pts. |
A circuit is set up as shown.
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| A. | I only | ||
| B. | II only | ||
| C. | III only | ||
| D. | I and II only | ||
| E. | I and III only | ||
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| 13. 1 pts. |
A circuit is set up as shown.
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| A. | I only | ||
| B. | II only | ||
| C. | I and II only | ||
| D. | I and III only | ||
| E. | I, II and III | ||
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| 14. 1 pts. |
A circuit is set up. The readings on ammeters A1, A2 and A3 are shown. (an ampere is the same as an amp, A) The reading on ammeter A4 is
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| A. | 1 ampere | ||
| B. | 7 ampere | ||
| C. | 10 ampere | ||
| D. | 11 ampere | ||
| E. | 14 ampere | ||
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| 15. 1 pts. |
A circuit is set up as shown.
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| A. | A | ||
| B. | B | ||
| C. | C | ||
| D. | D | ||
| E. | E | ||
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