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MCQs

Total Questions : 480 | Page 9 of 48 pages
Question 81. What is a negative ion?
  1.    An atom that contains more electrons than neutrons
  2.    An atom that contains more protons than neutrons
  3.    An atom that contains more electrons than protons
  4.    An atom that contains more protons than electrons
  5.    None of the above
 Discuss Question
Answer: Option C. -> An atom that contains more electrons than protons
Question 82. In a transistor operates at the middle of the load line, an increase in the base resistance will move the Q point
  1.    down
  2.    up
  3.    nowhere
  4.    off the load line
  5.    None of the above
 Discuss Question
Answer: Option A. -> down
Question 83. Voltage is
  1.    The flow of charged particles through a material
  2.    The smallest electrically charged particle
  3.    Trie force that causes electrons to flow
  4.    The number of free electrons in an atom
  5.    None of the above
 Discuss Question
Answer: Option C. -> Trie force that causes electrons to flow
Question 84. The total impedance of a series RLC circuit:
  1.    is minimum at the resonant frequency
  2.    always increases as the applied frequency increases
  3.    always decreases as the applied frequency increases
  4.    is maximum at the resonant frequency
  5.    None of the above
 Discuss Question
Answer: Option A. -> is minimum at the resonant frequency
Question 85. What is the turns ratio for the transformer specified in the above question?
  1.    10.738
  2.    0.707
  3.    1.5
  4.    0.575
  5.    None of the above
 Discuss Question
Answer: Option B. -> 0.707
Question 86. The direction of electron current flow is:
  1.    from right to left
  2.    from positive to negative
  3.    from negative to positive
  4.    from neutral to positive
  5.    None of the above
 Discuss Question
Answer: Option C. -> from negative to positive
Question 87. A device that converts mechanical pressure to electrical energy is called a:
  1.    piezoelectric device
  2.    solar cell
  3.    photodiode
  4.    nicad cell
  5.    None of the above
 Discuss Question
Answer: Option A. -> piezoelectric device
Question 88. Which one of the following statements is true for the voltage in a parallel RC circuit?
  1.    The voltage always has the same amplitude and phase for every part of the circuit
  2.    The total voltage is equal to the sum of the voltages across the resistance and capacitance
  3.    The total voltage leads the total current by less than 90 degree
  4.    The total voltage is less than the sum of the voltages across the resistance and capacitance
  5.    None of the above
 Discuss Question
Answer: Option A. -> The voltage always has the same amplitude and phase for every part of the circuit
Question 89. The Thevenin resistance is equal in value to the
  1.    Load resistance
  2.    Half the load resistance
  3.    Internal resistance of a Morton circuit
  4.    Open-load resistance
  5.    None of the above
 Discuss Question
Answer: Option A. -> Load resistance
Question 90. Most AC power is obtained from:
  1.    generators
  2.    batteries
  3.    oscillators
  4.    lightning
  5.    None of the above
 Discuss Question
Answer: Option C. -> oscillators

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