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MCQs

Total Questions : 71 | Page 2 of 8 pages
Question 11. What is the approximate resistance of a rheostat if the voltage source is 18 V and the current is 220 mA?
  1.    8.2 kΩ
  2.    820 Ω
  3.    8.2 Ω
  4.    82 Ω
 Discuss Question
Answer: Option D. -> 82 Ω
Question 12. A resistance of 3.3 MO is connected across a 500 V source. The resulting current is approximately
  1.    15.1 µA
  2.    151 µA
  3.    66 mA
  4.    660 mA
 Discuss Question
Answer: Option B. -> 151 µA
Question 13. An electric heater draws 3.5 A from a 110 V source. The resistance of the heating element is approximately
  1.    385 Ω
  2.    38.5 Ω
  3.    3.1 Ω
  4.    31 Ω
 Discuss Question
Answer: Option D. -> 31 Ω
Question 14. A current of 200 µA through a 6.8 kΩ resistor produces a voltage drop of
  1.    34.4 V
  2.    340 V
  3.    13.6 V
  4.    1.36 V
 Discuss Question
Answer: Option D. -> 1.36 V
Question 15. How much voltage is needed to produce 2.5 A of current through a 200 Ω resistor?
  1.    50 V
  2.    500 V
  3.    80 V
  4.    8 V
 Discuss Question
Answer: Option B. -> 500 V
Question 16. Twelve volts are applied across a resistor. A current of 3 mA is measured. What is the value of the resistor?
  1.    4 Ω
  2.    400 Ω
  3.    4 kΩ
  4.    4.4 Ω
 Discuss Question
Answer: Option C. -> 4 kΩ
Question 17. How much resistance is needed to draw 17.6 mA from a 12 volt source?
  1.    212 Ω
  2.    6.8 kΩ
  3.    68 Ω
  4.    680 Ω
 Discuss Question
Answer: Option D. -> 680 Ω
Question 18. The formula for finding resistance when current and voltage are known is R = I/V.
  1.    True
  2.    False
 Discuss Question
Answer: Option B. -> False
Question 19. The formula for finding voltage when resistance and current are known is V = I/R.
  1.    True
  2.    False
 Discuss Question
Answer: Option B. -> False
Question 20. When there is 12 mA of current through a 1.2 kΩ resistor, the voltage across the resistor is
  1.    14.4 V
  2.    1.4 V
  3.    100 V
  4.    10 V
 Discuss Question
Answer: Option A. -> 14.4 V

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