5555555555 20. What is the approximate resistance of a rheostat if the voltage source is 18 V and the current is 220 mA? (a) 8.2 kΩ (b) 820 Ω (c) 8.2 Ω (d) 82 Ω
5555555555 19. What is the approximate filament resistance of a light bulb if it operates from a 110 V source and 0.6 A of current is flowing? (a) 183 Ω (b) 18.3 Ω (c) 66 Ω (d) 6.6 Ω
5555555555 8. A resistance of 3.3 MΩ is connected across a 500 V source. The resulting current is approximately ________. (a) 15.1 µA (b) 151 µA (c) 66 mA (d) 660 mA