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MCQs

Total Questions : 96 | Page 5 of 10 pages
Question 41. Three lights are connected in parallel across a 120 volt source. If one light burns out,
  1.    the remaining two will not light
  2.    the remaining two will glow brighter
  3.    the remaining two will glow dimmer
  4.    the remaining two will glow with the same brightness as before
 Discuss Question
Answer: Option D. -> the remaining two will glow with the same brightness as before
Question 42. Four resistors of equal value are connected in parallel. If the total voltage is 15 V and the total resistance is 600 , the current through each parallel resistor is
  1.    6.25 mA
  2.    200 mA
  3.    25 mA
  4.    100 mA
 Discuss Question
Answer: Option A. -> 6.25 mA
Question 43. Four 8 speakers are connected in parallel to the output of an audio amplifier. If the maximum voltage to the speakers is 12 V, the amplifier must be able to deliver to the speakers
  1.    48 W
  2.    18 W
  3.    1.5 W
  4.    72 W
 Discuss Question
Answer: Option D. -> 72 W
Question 44. A 470 resistor, a 220 resistor, and a 100 resistor are all in parallel. The total resistance is approximately
  1.    470
  2.    60
  3.    30
  4.    790
 Discuss Question
Answer: Option B. -> 60
Question 45. Five 100 resistors are connected in parallel. If one resistor is removed, the total resistance is
  1.    500
  2.    25
  3.    20
  4.    100
 Discuss Question
Answer: Option B. -> 25
Question 46. 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.    9.09 A
  2.    2.2 A
  3.    1.8 A
  4.    137 mA
 Discuss Question
Answer: Option C. -> 1.8 A
Question 47. The following resistors are in parallel across a voltage source: 220 , 470 , and 560 . The resistor with the least current is
  1.    220
  2.    470
  3.    560
  4.    impossible to determine without knowing the voltage
 Discuss Question
Answer: Option C. -> 560
Question 48. 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.    the circuit is operating properly
  3.    R1 is open
  4.    R2 is open
 Discuss Question
Answer: Option A. -> R3 is open
Question 49. 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.    900 mA
  3.    1.24 A
  4.    540 mA
 Discuss Question
Answer: Option C. -> 1.24 A
Question 50. Three 47 resistors are connected in parallel across a 110 volt source. The current drawn from the source is approximately
  1.    47 mA
  2.    780 mA
  3.    2.3 A
  4.    7.06 A
 Discuss Question
Answer: Option D. -> 7.06 A

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