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 10. If 24 V are applied across a resistor and there are 10.9 mA of current, the resistance is ________. (a) 220 kΩ (b) 22 kΩ (c) 2.2 kΩ (d) 220 Ω
5555555555 9. A 47 Ω resistor and a capacitor with 150 Ω of capacitive reactance are in series across an ac source. The impedance, expressed in rectangular form, is ________. (a) Z = 47 Ω + j150 Ω (b) Z = 47 Ω – j150 Ω (c) Z = 197 Ω (d) Z = 103 Ω