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- Question
If one of the resistors in a parallel circuit is removed, the total resistance
Options- A. decreases
- B. increases
- C. remains the same
- D. doubles
- Correct Answer
- increases
- 1. Four equal-value resistors are connected in parallel. Ten volts are applied across the parallel circuit and 2 mA are measured from the source. The value of each resistor is
Options- A. 12.5 Ω
- B. 200 Ω
- C. 20 KΩ
- D. 50 Ω Discuss
- 2. The power dissipation in each of four parallel branches is 1.2 W. The total power dissipation is
Options- A. 1.2 W
- B. 4.8 W
- C. 0.3 W
- D. 12 W Discuss
- 3. 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
Options- A. 490 mA
- B. 800 mA
- C. 310 mA
- D. 0 A Discuss
- 4. 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
- 5. 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
- 6. When a 1.6 kΩ resistor and a 120 Ω resistor are connected in parallel, the total resistance is
Options- 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 Discuss
- 7. The currents into a junction flow along two paths. One current is 4 A and the other is 3 A. The total current out of the junction is
Options- A. 1 A
- B. 7 A
- C. unknown
- D. the larger of the two Discuss
- 8. Five light bulbs are connected in parallel across 110 V. Each bulb is rated at 200 W. The current through each bulb is approximately
Options- A. 2.2 A
- B. 137 mA
- C. 1.8 A
- D. 9.09 A Discuss
- 9. Six resistors are in parallel. The two lowest-value resistors are both 1.2 kΩ. The total resistance
Options- 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 Discuss
- 10. If there are a total of 120 mA into a parallel circuit consisting of three branches, and two of the branch currents are 40 mA and 10 mA, the third branch current is
Options- A. 50 mA
- B. 70 mA
- C. 120 mA
- D. 40 mA Discuss
Parallel Circuits problems
Search Results
Correct Answer: 20 KΩ
Explanation:
10/(R/4) = 2 mA
40/R = 2 mA
R = 40/2 mA
= 40/0.002 A
= 20000 kohm (20 kohm)
40/R = 2 mA
R = 40/2 mA
= 40/0.002 A
= 20000 kohm (20 kohm)
Correct Answer: 4.8 W
Correct Answer: 490 mA
Correct Answer: 31.25 mA
Correct Answer: an increase in source voltage
Correct Answer: less than 120 Ω but greater than 100 Ω
Correct Answer: 7 A
Correct Answer: 1.8 A
Correct Answer: is less than 600 Ω
Correct Answer: 70 mA
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