11. Six resistors are in parallel. The two lowest-value resistors are both 1.2 kΩ. The total resistance ________.
(a) is less than 6 kΩ
(b) is greater than 1.2 kΩ
(c) is less than 1.2 kΩ
(d) is less than 600 Ω
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
13. Four 8 Ω speakers are connected in parallel to the output of an audio amplifier. If the maximum voltage to the speakers is 12 V, the amplifier must be able to deliver to the speakers ________.
(a) 18 W
(b) 1.5 W
(c) 48 W
(d) 72 W
14. A set of Christmas tree lights is connected in parallel across a 110 V source. The filament of each light bulb is 1.8 kΩ. The current through each bulb is approximately ________.
(a) 610 mA
(b) 18 mA
(c) 110 mA
(d) 61 mA
15. Four resistors are connected in parallel. Fifteen mA flows through resistor R. If the second resistor is 2R, the third resistor 3R, and the fourth resistor 4R, the total current in the circuit is ________.
(a) 60 mA
(b) 15 mA
(c) 135 mA
(d) 31.25 mA
Related Posts
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 5. The total resistance of a parallel circuit is 50 Ω. If the total current is 120 mA, the current through the 270 Ω resistor that makes up part of the parallel circuit is approximately ________. (a) 22 mA (b) 120 mA (c) 220 mA (d) 50 mA
- 5555555555 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
- 5555555555 15. A series circuit has a 24 V source and a total resistance of 120 Ω. The current through each resistor is ________. (a) 24 mA (b) 200 mA (c) 120 mA (d) 20 mA
- 5555555555 2. A certain series circuit consists of a 1/8 W resistor, a 1/4 W resistor, and a 1/2 W resistor. The total resistance is 1200 Ω. If each resistor is operating in the circuit at its maximum power dissipation, total current flow is ________. (a) 27 mA (b) 2.7 mA (c) 19 mA (d) 190 mA