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MCQs

Total Questions : 96 | Page 4 of 10 pages
Question 31. 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
 Discuss Question
Answer: Option D. -> Is less than 600 Ω
Question 32. The total resistance of a parallel circuit is 50 Ω. If the total current is 120 mA, the current through the 270 Ω resistor that makes up part of the parallel circuit is approximately
  1.    22 mA
  2.    120 mA
  3.    220 mA
  4.    50 mA
 Discuss Question
Answer: Option A. -> 22 mA
Question 33. A set of Christmas tree lights is connected in parallel across a 110 V source. The filament of each light bulb is 1.8 kΩ. The current through each bulb is approximately
  1.    610 mA
  2.    18 mA
  3.    110 mA
  4.    61 mA
 Discuss Question
Answer: Option D. -> 61 mA
Question 34. Five light bulbs are connected in parallel across 110 V. Each bulb is rated at 200 W. The current through each bulb is approximately
  1.    2.2 A
  2.    137 mA
  3.    1.8 A
  4.    9.09 A
 Discuss Question
Answer: Option C. -> 1.8 A
Question 35. A set of Christmas tree lights is connected in parallel across a 110 V source. The filament of each light bulb is 1.8 k. The current through each bulb is approximately
  1.    610 mA
  2.    18 mA
  3.    110 mA
  4.    61 mA
 Discuss Question
Answer: Option D. -> 61 mA
Question 36. The sum of the currents into a junction is equal to the sum of the currents out of that junction.
  1.    True
  2.    False
 Discuss Question
Answer: Option A. -> True
Question 37. 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.    120 mA
  2.    50 mA
  3.    40 mA
  4.    70 mA
 Discuss Question
Answer: Option D. -> 70 mA
Question 38. A set of Christmas tree lights is connected in parallel across a 110 V source. The filament of each light bulb is 1.8 k. The current through each bulb is approximately
  1.    110 mA
  2.    610 mA
  3.    18 mA
  4.    61 mA
 Discuss Question
Answer: Option D. -> 61 mA
Question 39. The power dissipation in each of four parallel branches is 1.2 W. The total power dissipation is
  1.    12 W
  2.    0.3 W
  3.    4.8 W
  4.    1.2 W
 Discuss Question
Answer: Option C. -> 4.8 W
Question 40. 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.    20 K
  2.    12.5
  3.    200
  4.    50
 Discuss Question
Answer: Option A. -> 20 K

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