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MCQs

Total Questions : 82 | Page 4 of 9 pages
Question 31. A certain voltage divider consists of three 1 k resistors in series. Which of the following load resistors will have the least effect on the output voltage?
  1.    100 k
  2.    1 k
  3.    1 M
  4.    330
 Discuss Question
Answer: Option C. -> 1 M
Question 32. A certain Wheatstone bridge has the following resistor values: R1 = 10 k, R2 = 720 , and R4 = 2.4 k. The unknown resistance is
  1.    24
  2.    3000
  3.    2.4
  4.    300
 Discuss Question
Answer: Option B. -> 3000
Question 33. On which of the following voltage range settings will a voltmeter present the minimum load on a circuit?
  1.    500 V
  2.    1,000 V
  3.    1 V
  4.    50 V
 Discuss Question
Answer: Option B. -> 1,000 V
Question 34. The parallel combination of a 470 resistor and a 1.5 k resistor is in series with the parallel combination of five 1 k resistors. The source voltage is 50 V. The percentage of the load current through any single 1 k resistor is
  1.    50%
  2.    25%
  3.    100%
  4.    20%
 Discuss Question
Answer: Option D. -> 20%
Question 35. A certain circuit is composed of two parallel resistors. The total resistance is 1,403 . One of the resistors is 2 k. The other resistor value is
  1.    2 k
  2.    4.7 k
  3.    1403
  4.    3403
 Discuss Question
Answer: Option B. -> 4.7 k
Question 36. When a load resistance is removed from the output of a voltage divider circuit, the current drawn from the source
  1.    remains the same
  2.    decreases
  3.    is cut off
  4.    increases
 Discuss Question
Answer: Option B. -> decreases
Question 37. The parallel combination of a 470 resistor and a 680 resistor is in series with the parallel combination of four 2 k resistors. The total resistance is
  1.    77.8
  2.    778
  3.    1650
  4.    1078
 Discuss Question
Answer: Option B. -> 778
Question 38. The internal resistance of a 30,000 ohm/volt voltmeter set on its 50 V range is
  1.    15000
  2.    15000000
  3.    1500000
  4.    150000
 Discuss Question
Answer: Option C. -> 1500000
Question 39. The parallel combination of a 6.8 k resistor and a 10 k resistor is in series with the parallel combination of a 2.2 k resistor and a 1 k resistor. A 100 V source is connected across the circuit. The resistor(s) with the greatest voltage drop is (are)
  1.    6.8 k
  2.    6.8 k and 10 k
  3.    2.2 k and 1 k
  4.    2.2 k
 Discuss Question
Answer: Option B. -> 6.8 k and 10 k
Question 40. Two 3.3 k resistors are in series and this series combination is in parallel with a 4.7 k resistor. The voltage across one of the 3.3 k resistors is 12 V. The voltage across the 4.7 k resistor is
  1.    6 V
  2.    0 V
  3.    24 V
  4.    12 V
 Discuss Question
Answer: Option C. -> 24 V

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