6. A sudden increase in the total current into a parallel circuit may indicate ________.
(a) a drop in source voltage
(b) an open resistor
(c) an increase in source voltage
(d) either a drop in source voltage or an open resistor
7. The following resistors are in parallel across a voltage source: 220 Ω, 470 Ω, and 560 Ω. The resistor with the least current is ________.
(a) 220 Ω
(b) 470 Ω
(c) 560 Ω
(d) impossible to determine without knowing the voltage
8. In a five-branch parallel circuit, there are 8 mA of current in each branch. If one of the branches opens, the current in each of the other four branches is ________.
(a) 48 mA
(b) 8 mA
(c) 0 A
(d) 3 mA
9. In a certain three-branch parallel circuit, R1 has 12 mA through it, R2 has 15 mA through it, and R3 has 25 mA through it. After measuring a total of 27 mA, you can say that ________.
(a) R3 is open
(b) R1 is open
(c) R2 is open
(d) the circuit is operating properly
10. If one of the resistors in a parallel circuit is removed, the total resistance ________.
(a) decreases
(b) increases
(c) remains the same
(d) doubles
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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