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MCQs

Total Questions : 227 | Page 13 of 23 pages
Question 121. A circuit has a Norton current of 10 mA and a Norton resistance of 10 kW. What is the Thevenin circuit?
  1.    None of these
  2.    100 V and a series resistance of 10 k Ohm
  3.    100 V and a parallel resistance of 10 k Ohm
  4.    1000 V and a parallel resistance of 10 kOhm
  5.    1000 V and a series resistance of 10 k Ohm
 Discuss Question
Answer: Option B. -> 100 V and a series resistance of 10 k Ohm
Question 122. Which one of the following statements is true?
  1.    All of these
  2.    None of these
  3.    Power dissipation of a pure capacitor decreases with operating frequency
  4.    There is no meaningful relationship between the power dissipation of a pure capacitor and its operating frequency
  5.    Power dissipation of a pure capacitor increases with operating frequency
 Discuss Question
Answer: Option D. -> There is no meaningful relationship between the power dissipation of a pure capacitor and its operating frequency
Question 123. A power transformer steps 100 V down to 10 V. If the current in its primary winding is 2 A, what is the current in the secondary winding?
  1.    20 A
  2.    0.20833333333333
  3.    None of these
  4.    50 A
 Discuss Question
Answer: Option A. -> 20 A
Question 124. A typical light switch in your home is a:
  1.    rotary switch
  2.    momentary push button switch
  3.    None of these
  4.    knife switch
  5.    toggle switch
 Discuss Question
Answer: Option E. -> toggle switch
Question 125. If a load resistance is 1 kW, a stiff voltage source has a resistance of
  1.    At least 10 Ohm
  2.    less than 10 Ohm
  3.    None of these
  4.    More than 100 k Ohm
  5.    Less than 100 k Ohm
 Discuss Question
Answer: Option B. -> less than 10 Ohm
Question 126. Suppose the voltage from a power outlet is 120 Vrms. What is the peak voltage?
  1.    None of these
  2.    120 V
  3.    180 V
  4.    170 V
  5.    100 V
 Discuss Question
Answer: Option D. -> 170 V
Question 127. How much power is being dissipated by a 1000 W resistance that has 25 V applied to it?
  1.    None of these
  2.    0.24 W
  3.    80 W
  4.    325 kW
  5.    0.625 W
 Discuss Question
Answer: Option E. -> 0.625 W
Question 128. A device that converts thermal energy to electrical energy is called a:
  1.    thermocouple
  2.    None of these
  3.    solar cell
  4.    chemical cell
  5.    piezoelectric devices
 Discuss Question
Answer: Option A. -> thermocouple
Question 129. A device that converts chemical energy to electrical energy is called a:
  1.    thermocouple
  2.    electric device
  3.    solar cell
  4.    chemical cell
  5.    None of these
 Discuss Question
Answer: Option D. -> chemical cell
Question 130. Suppose the peak value of a sinusoidal voltage is 50 V. What is the rms value?
  1.    35.4 V
  2.    30.4 V
  3.    37.4 V
  4.    38.74 V
  5.    None of these
 Discuss Question
Answer: Option A. -> 35.4 V

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