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 16. What is the approximate resistance setting of a rheostat in which 650 mA of current flows with a 150 V source? (a) 9.7 Ω (b) 97 Ω (c) 23 Ω (d) 230 Ω
5555555555 6. Approximately how many milliamperes of current flow through a circuit with a 40 V source and 6.8 kΩ of resistance? (a) 27.2 mA (b) 59 mA (c) 5.9 mA (d) 590 mA