17. A 470 Ω resistor and a coil with 125 Ω inductive reactance are in parallel. Both components are across a 15 V ac voltage source. Current through the inductor is ________.
(a) 152 mA (b) 32 mA (c) 12 mA (d) 120 mA
Answer
Answer : (d)
Explanation
Explanation :
I = V/XL = 15/125 = 0.12 A = 120 mA.
5555555555 21. A 90 Ω resistor, a coil with 30 Ω of reactance, and a capacitor with 50 Ω of reactance are in series across a 12 V ac source. The current through the resistor is ________. (a) 9 mA (b) 90 mA (c) 13 mA (d) 130 mA
5555555555 14. A 90 Ω resistor, a coil with 30 Ω of reactance, and a capacitor with 50 Ω of reactance are in series across a 12 V ac source. The current through the resistor is ________. (a) 9 mA (b) 90 mA (c) 13 mA (d) 130 mA
5555555555 25. A 120 V voltage source has a source resistance, RS, of 60 Ω. The equivalent current source is ________. (a) 2 A (b) 4 A (c) 200 mA (d) 400 mA
5555555555 22. There is a total of 800 mA of current into four parallel resistors. The currents through three of the resistors are 40 mA, 70 mA, and 200 mA. The current through the fourth resistor is ________. (a) 490 mA (b) 800 mA (c) 310 mA (d) 0 A
5555555555 14. A 140 Ω resistor is in parallel with an inductor having 60 Ω inductive reactance. Both components are across a 12 V ac source. The magnitude of the total impedance is ________. (a) 5.51 Ω (b) 55.15 Ω (c) 90 Ω (d) 200 Ω