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MCQs

Total Questions : 480 | Page 14 of 48 pages
Question 131. Which one of the following statements applies to common auto batteries?
  1.    Auto batteries are primary wet-cell batteries
  2.    Auto batteries are secondary wet-cell batteries
  3.    Auto batteries are secondary dry-cell batteries
  4.    Auto batteries are primary dry-cell batteries
  5.    None of the above
 Discuss Question
Answer: Option B. -> Auto batteries are secondary wet-cell batteries
Question 132. Which one of the following equations most directly determines the power dissipation of a resistance when you know the power dissipation of a resistance when you know the voltage drop and current?
  1.    P = IE
  2.    P = E2/R
  3.    P = I2R
  4.    I = P/E
  5.    None of the above
 Discuss Question
Answer: Option A. -> P = IE
Question 133. If N1/N2 = 2, and the primary voltage is 120 V, what is the secondary voltage?
  1.    0 V
  2.    36 V
  3.    40 V
  4.    60 V
  5.    None of the above
 Discuss Question
Answer: Option D. -> 60 V
Question 134. A device that converts light energy to electrical energy is called a:
  1.    thermocouple
  2.    solar cell
  3.    photodiode
  4.    photo transistor
  5.    None of the above
 Discuss Question
Answer: Option B. -> solar cell
Question 135. How much current flows through a 60-W light bulb that is operating at 120 V?
  1.    0.5A
  2.    180 A
  3.    2:00 AM
  4.    7200 A
  5.    None of the above
 Discuss Question
Answer: Option A. -> 0.5A
Question 136. What is the power dissipation of a resistance that has 24 V dropped across it and 0.25 A flowing through it?
  1.    3 W
  2.    6 W
  3.    64 W
  4.    122 W
  5.    None of the above
 Discuss Question
Answer: Option B. -> 6 W
Question 137. Which one of the following kinds of materials has the highest permeability?
  1.    A diamagnetic material
  2.    A ferromagnetic material
  3.    A paramagnetic material
  4.    All of the above
  5.    None of the above
 Discuss Question
Answer: Option B. -> A ferromagnetic material
Question 138. Inductive reactance is measured in units of:
  1.    volts per second
  2.    amperes per second
  3.    Ohm
  4.    henrys
  5.    None of the above
 Discuss Question
Answer: Option C. -> Ohm
Question 139. An ideal voltage source has
  1.    Zero internal resistance
  2.    Infinite internal resistance
  3.    A load dependent voltage
  4.    A load-dependent current
  5.    None of the above
 Discuss Question
Answer: Option A. -> Zero internal resistance
Question 140. What is the difference between the kinds of charges for an electron and a proton?
  1.    An electron has a positive charge and a proton has no charge
  2.    An electron has a positive charge and a proton has a negative charge
  3.    An electron has a negative charge and a proton has a positive charge
  4.    An electron has a negative charge and a proton has no charge
  5.    None of the above
 Discuss Question
Answer: Option C. -> An electron has a negative charge and a proton has a positive charge

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