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MCQs

Total Questions : 96 | Page 3 of 10 pages
Question 21. The power dissipation in each of four parallel branches is 1.2 W. The total power dissipation is
  1.    1.2 W
  2.    4.8 W
  3.    0.3 W
  4.    12 W
 Discuss Question
Answer: Option B. -> 4.8 W
Question 22. Three 47 Ω resistors are connected in parallel across a 110 volt source. The current drawn from the source is approximately
  1.    2.3 A
  2.    780 mA
  3.    47 mA
  4.    7.06 A
 Discuss Question
Answer: Option D. -> 7.06 A
Question 23. 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
  1.    50 mA
  2.    70 mA
  3.    120 mA
  4.    40 mA
 Discuss Question
Answer: Option B. -> 70 mA
Question 24. A parallel circuit acts as a current divider.
  1.    True
  2.    False
 Discuss Question
Answer: Option A. -> True
Question 25. The number of current paths equals the number of resistors in parallel.
  1.    True
  2.    False
 Discuss Question
Answer: Option A. -> True
Question 26. 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
  1.    1 A
  2.    7 A
  3.    Unknown
  4.    The larger of the two
 Discuss Question
Answer: Option B. -> 7 A
Question 27. Parallel resistors are connected between the same two points.
  1.    True
  2.    False
 Discuss Question
Answer: Option A. -> True
Question 28. The following resistors are in parallel across a voltage source: 220 Ω, 470 Ω, and 560 Ω. The resistor with the least current is
  1.    220 Ω
  2.    470 Ω
  3.    560 Ω
  4.    Impossible to determine without knowing the voltage
 Discuss Question
Answer: Option C. -> 560 Ω
Question 29. When an additional resistor is connected across an existing parallel circuit, the total resistance
  1.    Remains the same
  2.    Decreases by the value of the added resistor
  3.    Increases by the value of the added resistor
  4.    Decreases
 Discuss Question
Answer: Option D. -> Decreases
Question 30. If one of the resistors in a parallel circuit is removed, the total resistance
  1.    Decreases
  2.    Increases
  3.    Remains the same
  4.    Doubles
 Discuss Question
Answer: Option B. -> Increases

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