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MCQs

Total Questions : 219 | Page 22 of 22 pages
Question 211. Three 60 W bulbs are in parallel across the 60 V power line. If one bulb burns open
  1.    There will be heavy current in the main line
  2.    The other two bulbs will light
  3.    All three bulbs will light
  4.    Rest of the two bulbs will not light
 Discuss Question
Answer: Option B. -> The other two bulbs will light
Question 212. For testing appliances, the wattage of test lamp should be
  1.    Low
  2.    High
  3.    Any value
  4.    Very low
 Discuss Question
Answer: Option B. -> High
Question 213. Which of the following materials has the least resistivity ?
  1.    Lead
  2.    Copper
  3.    Zinc
  4.    Mercury
 Discuss Question
Answer: Option B. -> Copper
Question 214. Are the materials having electrical conductivity much less than most of the metals but much greater than that of typical insulators.
  1.    Thermistor
  2.    Variable resistors
  3.    Varistors
  4.    Semiconductors
 Discuss Question
Answer: Option D. -> Semiconductors
Question 215. A thermistor has
  1.    Zero temperature coefficient
  2.    Positive temperature coefficient
  3.    Variable temperature coefficient
  4.    Negative temperature coefficient
 Discuss Question
Answer: Option A. -> Zero temperature coefficient
Question 216. Resistance of 220 V, 100 W lamp will be
  1.    484 ft
  2.    4.84 Q
  3.    4840 Q
  4.    48.4 Q
 Discuss Question
Answer: Option A. -> 484 ft
Question 217. Nichrome wire is an alloy of
  1.    Nickel and chromium
  2.    Copper and silver
  3.    Lead and zinc
  4.    Chromium and vanadium
 Discuss Question
Answer: Option A. -> Nickel and chromium
Question 218. In a series circuit with unequal resistances
  1.    The highest resistance has the highest voltage drop
  2.    The lowest resistance has the highest current
  3.    The lowest resistance has the highest voltage drop
  4.    The highest resistance has the most of the current through it
 Discuss Question
Answer: Option A. -> The highest resistance has the highest voltage drop
Question 219. All of the following are equivalent to watt except
  1.    (Amperes) ohm
  2.    Amperes × volts
  3.    Joules/sec.
  4.    Amperes/volt
 Discuss Question
Answer: Option D. -> Amperes/volt

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