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MCQs

Total Questions : 96 | Page 2 of 10 pages
Question 11. An ammeter has an internal resistance of 50 Ω. The meter movement itself can handle up to 1 mA. If 10 mA is applied to the meter, the shunt resistor, RSH1, is approximately
  1.    55 Ω
  2.    5.5 Ω
  3.    50 Ω
  4.    9 Ω
 Discuss Question
Answer: Option B. -> 5.5 Ω
Question 12. In a five-branch parallel circuit, there are 12 mA of current in each branch. If one of the branches opens, the current in each of the other four branches is
  1.    48 mA
  2.    12 mA
  3.    0 A
  4.    3 mA
 Discuss Question
Answer: Option B. -> 12 mA
Question 13. Four 8 Ω 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.    18 W
  2.    1.5 W
  3.    48 W
  4.    72 W
 Discuss Question
Answer: Option D. -> 72 W
Question 14. A 470 Ω resistor, a 220 Ω resistor, and a 100 Ω resistor are all in parallel. The total resistance is approximately
  1.    790 Ω
  2.    470 Ω
  3.    60 Ω
  4.    30 Ω
 Discuss Question
Answer: Option C. -> 60 Ω
Question 15. 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
 Discuss Question
Answer: Option A. -> R3 is open
Question 16. Total power in a parallel circuit is found by adding up the power of all the individual resistors.
  1.    True
  2.    False
 Discuss Question
Answer: Option A. -> True
Question 17. 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
 Discuss Question
Answer: Option D. -> 31.25 mA
Question 18. Three lights are connected in parallel across a 120 volt source. If one light burns out,
  1.    The remaining two will glow dimmer
  2.    The remaining two will glow brighter
  3.    The remaining two will not light
  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 19. 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
 Discuss Question
Answer: Option C. -> 1.24 A
Question 20. Four resistors of equal value are connected in parallel. If the total voltage is 15 V and the total resistance is 600 Ω, the current through each parallel resistor is
  1.    25 mA
  2.    100 mA
  3.    6.25 mA
  4.    200 mA
 Discuss Question
Answer: Option C. -> 6.25 mA

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