8 Which of the following correctly ranks the bulbs in brightness? All bulbs are equally bright. A. B. 1 is brightest, 2 next brightest, 3 next brightest and 4 dimmest 1 is brightest. 2 and 3 are equally bright, and each is dimmer than 1. 4 is dimmest. 1 and 4 are equally bright. 2 and 3 are equally bright, and each is dimmer than 1 or 4. E. 2 and 3 are equally bright. 1 and 4 are equally bright, and each is dimmer than 2 or 3. F. 1 is brightest, 4 is next brightest. 2 and 3 are equally bright, and each is dimmer than 4. J. None of these is correct. C. D. 9. Which of the following correctly ranks the currents flowing through the bulbs? A. All bulbs have the same current flowing through them. B. The current through 1 is largest, 2 next largest, 3 next largest and 4 smallest. C. D. The current through 1 is largest. 2 is the same as 3, and each is smaller than 1. 4 is smallest. The current through 1 and 4 is the same. 2 is the same as 3, and each is smaller than 1 or 4. The current through 2 and 3 is the same. I is the same as 4, and each is smaller than 2 or 3. The current through 1 is largest, 4 is next largest. 2 is the same as 3, and each is smaller than 4. J. None of these is correct. E. F. the bulbs? 3 D. E. F. 2 fM m IS (switch) sj 8. Which of the following correctly ranks the bulbs in brightness? A. All bulbs are equally bright. B. 1 is brightest, 2 next brightest, 3 next brightest and 4 dimmest C. 1 is brightest. 2 and 3 are equally bright, and each is dimmer than 1. 4 is dimmest. 1 and 4 are equally bright. 2 and 3 are equally bright, and each is dimmer than 1 or 4. 2 and 3 are equally bright. 1 and 4 are equally bright, and each is dimmer than 2 or 3. 1 is brightest, 4 is next brightest. 2 and 3 are equally bright, and each is dimmer than 4. J. None of these is correct. through the bulbs? 10. Which of the following correctly ranks the potential differences across the bulbs? A. All bulbs have the same potential difference across them. B. The potential difference across 1 is largest, 2 next largest, 3 next largest and 4 smallest. D. E. C. The potential difference across 1 is largest. 2 is the same as 3, and each is smaller than 1. 4 is smallest. The potential difference across 1 is the same as 4. 2 is the same as 3, and each is smaller than 1 or 4. The potential difference across 2 is the same as 3. 1 is the same as 4, and each is smaller than 2 or 3. The potential difference across 1 is largest, 4 is next largest. 2 is the same as 3, and each is smaller than 4. J. None of these is correct. F. 11. What happens to the current through bulb 1 if the switch, S, is opened? A. It increases. B. C. J. It remains the same. It decreases. Not enough information is given. to the current through bulb 2 if the switch, S, is opened? It increases. 12. What happens A. B. It remains the same. C. It decreases. J. Not enough information is given. 1992.9 D. Sokoloff