Parallel Circuits(Electrical Engineering Questions ) Questions and Answers

Question 1. 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______________?
  1.    490 mA
  2.    800 mA
  3.    310 mA
  4.    0 A
Explanation:-
Answer: Option A. -> 490 mA
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 2. Six resistors are in parallel. The two lowest-value resistors are both 1.2 kΩ. The total resistance______________?
  1.    is less than 6 kΩ
  2.    is greater than 1.2 kΩ
  3.    is less than 1.2 kΩ
  4.    is less than 600 Ω
Explanation:-
Answer: Option D. -> is less than 600 Ω
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 3. 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______________?
  1.    60 mA
  2.    15 mA
  3.    135 mA
  4.    31.25 mA
Explanation:-
Answer: Option D. -> 31.25 mA
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 4. If one of the resistors in a parallel circuit is removed, the total resistance_____________?
  1.    decreases
  2.    increases
  3.    remains the same
  4.    doubles
Explanation:-
Answer: Option B. -> increases
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 5. 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____________?
  1.    200 mA
  2.    540 mA
  3.    1.24 A
  4.    900 mA
Explanation:-
Answer: Option C. -> 1.24 A
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 6. 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____________?
  1.    R3 is open
  2.    R1 is open
  3.    R2 is open
  4.    the circuit is operating properly
Explanation:-
Answer: Option A. -> R3 is open
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 7. Six resistors are in parallel. The two lowest-value resistors are both 1.2 kΩ. The total resistance_____________?
  1.    is less than 6 kΩ
  2.    is greater than 1.2 kΩ
  3.    is less than 1.2 kΩ
  4.    is less than 600 Ω
Explanation:-
Answer: Option D. -> is less than 600 Ω
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 8. Five 100 Ω resistors are connected in parallel. If one resistor is removed, the total resistance is______________?
  1.    25 Ω
  2.    500 Ω
  3.    100 Ω
  4.    20 Ω
Explanation:-
Answer: Option A. -> 25 Ω
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 9. The following resistors are in parallel across a voltage source: 220Ω , 470Ω , and 560Ω . The resistor with the least current is______________?
  1.    220 Ω
  2.    470 Ω
  3.    560 Ω
  4.    impossible to determine without knowing the voltage
Explanation:-
Answer: Option C. -> 560 Ω
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 10. The total resistance of a parallel circuit is 50 Ω. If the total current is 120 mA, the current through the 270 Ω that makes up part of the parallel circuit is approximately_______________?
  1.    22 mA
  2.    120 mA
  3.    220 mA
  4.    50 mA
Explanation:-
Answer: Option A. -> 22 mA
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
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