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MCQs

Total Questions : 199 | Page 17 of 20 pages
Question 161. . The unit for voltage is the ___ and the symbol for voltage is ___.
  1.    joule, V
  2.    coulomb, J
  3.    volt, Q
  4.    volt, V
 Discuss Question
Answer: Option D. -> volt, V
Question 162. . A connection to the frame of a piece of electronic equipment is sometimes referred to as ___ ground.
  1.    a chassis
  2.    an earth
  3.    a circuit
  4.    either chassis or circuit
 Discuss Question
Answer: Option D. -> either chassis or circuit
Question 163. . f an electrical system is compared to a fluid system, the electrical current corresponds to the:
  1.    pressure
  2.    pump
  3.    water wheel
  4.    water flow
 Discuss Question
Answer: Option D. -> water flow
Question 164. . Which of the following statements is true?
  1.    Unlike charges repel and like charges attract.
  2.    Like charges repel and unlike charges attract.
  3.    Unlike charges attract and like charges attract.
  4.    Like charges repel and unlike charges repel.
 Discuss Question
Answer: Option B. -> Like charges repel and unlike charges attract.
Question 165. . Fuses and circuit breakers are designed to ___ when excessive current flows.
  1.    buzz
  2.    illuminate
  3.    close
  4.    open
 Discuss Question
Answer: Option D. -> open
Question 166. . The capacity of a battery cell is measured by the amount of __________ that can be supplied over time.
  1.    current
  2.    voltage
  3.    coulombs
  4.    joules
 Discuss Question
Answer: Option A. -> current
Question 167. . A rheostat is ___.
  1.    a three-terminal device that controls current
  2.    a two-terminal device that controls current
  3.    a two-terminal device that divides voltage
  4.    a three-terminal device that divides voltage
 Discuss Question
Answer: Option B. -> a two-terminal device that controls current
Question 168. . If an electronic component fails by developing an open circuit, the current will __________.
  1.    increase
  2.    decrease
  3.    cease
  4.    not change
 Discuss Question
Answer: Option C. -> cease
Question 169. . An atom of a semiconductor has _______________ electrons in the valence shell.
  1.    4
  2.    8
  3.    2
  4.    0
 Discuss Question
Answer: Option A. -> 4
Question 170. . ___ make electric current possible.
  1.    Protons
  2.    Neutrons
  3.    Shells
  4.    Free electrons
 Discuss Question
Answer: Option D. -> Free electrons

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