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MCQs

Total Questions : 227 | Page 16 of 23 pages
Question 151. What is a free electron?
  1.    An electron that has been freed from its parent atom
  2.    An electron that has twice the amount of charge of a normal electron
  3.    An electron that has no electrical charge
  4.    None of these
  5.    An electron that costs nothing
 Discuss Question
Answer: Option A. -> An electron that has been freed from its parent atom
Question 152. To get the Norton current, you have to
  1.    Open the voltage source
  2.    Open the load resistor
  3.    Short the voltage source
  4.    None of these
  5.    Short the load resistor
 Discuss Question
Answer: Option C. -> Short the voltage source
Question 153. The barrier potential accross each depletion layer is
  1.    0.8 V
  2.    None of these
  3.    20 V
  4.    0.7 V
 Discuss Question
Answer: Option D. -> 0.7 V
Question 154. What kind of battery is most likely included in a cordless electric knife?
  1.    None of these
  2.    Nicad battery
  3.    Zinc-carbon battery
  4.    Mercury-cell battery
  5.    Lead-acid battery
 Discuss Question
Answer: Option D. -> Mercury-cell battery
Question 155. Which one of the following properties of a magnetic circuit can be directly compared to voltage in an electrical circuit?
  1.    Flux density
  2.    Number of lines of force
  3.    Magnetomotive force
  4.    Reluctance
  5.    None of these
 Discuss Question
Answer: Option C. -> Magnetomotive force
Question 156. The basic unit of measurement for resistance is the:
  1.    ohm
  2.    None of these
  3.    ampere
  4.    volt
  5.    watt
 Discuss Question
Answer: Option A. -> ohm
Question 157. Suppose a step-down transformer has a turns ration of 5:1. If the secondary current is 1A rms, what is the primary-current?
  1.    0.6 A
  2.    None of these
  3.    0.3 A
  4.    0.2 A
  5.    0.4 A
 Discuss Question
Answer: Option D. -> 0.2 A
Question 158. The valence electron of a copper atom experiences what kind of attraction toward the nucleus?
  1.    Strong
  2.    Weak
  3.    None of these
  4.    Neutral
  5.    Impossible to say
 Discuss Question
Answer: Option B. -> Weak
Question 159. When operating below its resonant frequency, a series RLC circuit has the characteristics of a:
  1.    None of these
  2.    series RL circuit
  3.    series RC circuit
  4.    series RLC circuit operated above its resonant frequency
  5.    purely resistive circuit
 Discuss Question
Answer: Option C. -> series RC circuit
Question 160. What is the phase shift between total current and voltage, if 100 ohm resistor connected in parallel with an inductor that has a reactance of 200W?
  1.    None of these
  2.    90 degree
  3.    26.6 degree
  4.    0 degree
  5.    180 degree
 Discuss Question
Answer: Option C. -> 26.6 degree

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