5555555555 12. A 470 Ω resistor, a 220 Ω resistor, and a 100 Ω resistor are all in parallel. The total resistance is approximately ________. (a) 790 Ω (b) 470 Ω (c) 60 Ω (d) 30 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
5555555555 3. When a 1.6 kΩ resistor and a 120 Ω resistor are connected in parallel, the total resistance is ________. (a) greater than 1.6 kΩ (b) greater than 120 Ω but less than 1.6 kΩ (c) less than 120 Ω but greater than 100 Ω (d) less than 100 Ω
5555555555 20. Four resistors of equal value are connected in parallel. If the total voltage is 15 V and the total resistance is 600 Ω, the current through each parallel resistor is ________. (a) 25 mA (b) 100 mA (c) 6.25 mA (d) 200 mA
5555555555 1. Two 1.2 kΩ resistors are in series and this series combination is in parallel with a 3.3 kΩ resistor. The total resistance is ________. (a) 138 Ω (b) 1,389 Ω (c) 5,700 Ω (d) 880 Ω