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- Question
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
- Correct Answer
- 1.8 A
- 1. 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
- 2. 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
- 3. 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 Discuss
- 4. 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
- 5. 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
- 6. 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
- 7. 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
- 8. 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
Options- A. R3 is open
- B. R1 is open
- C. R2 is open
- D. the circuit is operating properly Discuss
- 9. The following currents are measured in the same direction in a three-branch parallel circuit: 200 mA, 340 mA, and 700 mA. The value of the current into the junction of these branches is
Options- A. 200 mA
- B. 540 mA
- C. 1.24 A
- D. 900 mA Discuss
- 10. Find the total current through R3 in the given circuit.
Options- A. 7.3 mA
- B. 5.5 mA
- C. 12.8 mA
- D. 1.8 mA Discuss
Parallel Circuits problems
Search Results
Correct Answer: 7 A
Correct Answer: less than 120 Ω but greater than 100 Ω
Correct Answer: increases
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: is less than 600 Ω
Correct Answer: 70 mA
Correct Answer: R3 is open
Correct Answer: 1.24 A
Correct Answer: 1.8 mA
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