Parallel Circuits(Engineering > Electrical Engineering ) Questions and Answers

Question 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
  1.    12.5 Ω
  2.    200 Ω
  3.    20 kΩ
  4.    50 Ω
Explanation:-
Answer: Option C. -> 20 kΩ
Question 2. 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
Question 3. When a 1.6 kΩ resistor and a 120 Ω resistor are connected in parallel, the total resistance is
  1.    Greater than 1.6 kΩ
  2.    Greater than 120 Ω but less than 1.6 kΩ
  3.    Less than 120 Ω but greater than 100 Ω
  4.    Less than 100 Ω
Explanation:-
Answer: Option C. -> Less than 120 Ω but greater than 100 Ω
Question 4. In a parallel circuit, the branch with the lowest resistance has the most current.
  1.    True
  2.    False
Explanation:-
Answer: Option A. -> True
Question 5. A sudden increase in the total current into a parallel circuit may indicate
  1.    A drop in source voltage
  2.    An open resistor
  3.    An increase in source voltage
  4.    Either a drop in source voltage or an open resistor
Explanation:-
Answer: Option C. -> An increase in source voltage
Question 6. 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
Question 7. The total current divides among parallel resistors in a manner directly proportional to the resistance values.
  1.    True
  2.    False
Explanation:-
Answer: Option B. -> False
Question 8. Addition of resistors in parallel increases total resistance and decreases total current.
  1.    True
  2.    False
Explanation:-
Answer: Option B. -> False
Question 9. The total resistance for two resistors in parallel is equal to the sum of the two resistors.
  1.    True
  2.    False
Explanation:-
Answer: Option B. -> False
Question 10. When an open circuit occurs in a parallel branch, the total resistance decreases.
  1.    True
  2.    False
Explanation:-
Answer: Option B. -> False
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