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- Question
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
Options- A. 22 mA
- B. 120 mA
- C. 220 mA
- D. 50 mA
- Correct Answer
- 22 mA
- 1. The following resistors are in parallel across a voltage source: 220 Ω, 470 Ω, and 560 Ω. The resistor with the least current is
Options- A. 220 Ω
- B. 470 Ω
- C. 560 Ω
- D. impossible to determine without knowing the voltage Discuss
- 2. An ammeter has an internal resistance of 50 Ω. The meter movement itself can handle up to 1 mA. If 10 mA is applied to the meter, the shunt resistor, RSH1, is approximately
Options- A. 55 Ω
- B. 5.5 Ω
- C. 50 Ω
- D. 9 Ω Discuss
- 3. Three 47 Ω resistors are connected in parallel across a 110 volt source. The current drawn from the source is approximately
Options- A. 2.3 A
- B. 780 mA
- C. 47 mA
- D. 7.06 A Discuss
- 4. When an additional resistor is connected across an existing parallel circuit, the total resistance
Options- A. remains the same
- B. decreases by the value of the added resistor
- C. increases by the value of the added resistor
- D. decreases Discuss
- 5. In a five-branch parallel circuit, there are 12 mA of current in each branch. If one of the branches opens, the current in each of the other four branches is
Options- A. 48 mA
- B. 12 mA
- C. 0 A
- D. 3 mA Discuss
- 6. 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
Options- A. 610 mA
- B. 18 mA
- C. 110 mA
- D. 61 mA Discuss
- 7. 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
Options- A. 18 W
- B. 1.5 W
- C. 48 W
- D. 72 W Discuss
- 8. 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
Options- A. 25 mA
- B. 100 mA
- C. 6.25 mA
- D. 200 mA Discuss
- 9. A sudden increase in the total current into a parallel circuit may indicate
Options- 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 Discuss
- 10. 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
Options- A. 60 mA
- B. 15 mA
- C. 135 mA
- D. 31.25 mA Discuss
Parallel Circuits problems
Search Results
Correct Answer: 560 Ω
Correct Answer: 5.5 Ω
Correct Answer: 7.06 A
Correct Answer: decreases
Correct Answer: 12 mA
Correct Answer: 61 mA
Correct Answer: 72 W
Correct Answer: 6.25 mA
Correct Answer: an increase in source voltage
Correct Answer: 31.25 mA
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