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MCQs

Total Questions : 152 | Page 15 of 16 pages
Question 141. A practical Q meter consists of __________
  1.    Wien bridge oscillator
  2.    AF oscillator
  3.    RF oscillator
  4.    Crystal oscillator
 Discuss Question
Answer: Option C. -> RF oscillator
Answer: (c).RF oscillator
Question 142. Q factor for a series resonant circuit is?
  1.    Q = \(\frac{X_L}{R} = \frac{X_C}{R}\)
  2.    Q = XL R = Xc R
  3.    Q = \(\frac{R}{X_L} = \frac{R}{X_C}\)
  4.    Q = \(\frac{1}{R}\)
 Discuss Question
Answer: Option A. -> Q = \(\frac{X_L}{R} = \frac{X_C}{R}\)
Answer: (a).Q = \(\frac{X_L}{R} = \frac{X_C}{R}\)
Question 143. Decibel covers a small range of values.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option B. -> False
Answer: (b).False
Question 144. Current can be measured effectively by making use of _________
  1.    d.c. voltmeter
  2.    a.c. ammeter
  3.    d.c. ammeter
  4.    a.c. voltmeter
 Discuss Question
Answer: Option D. -> a.c. voltmeter
Answer: (d).a.c. voltmeter
Question 145. Noise is a function of _________
  1.    voltage
  2.    current
  3.    bandwidth
  4.    frequency
 Discuss Question
Answer: Option C. -> bandwidth
Answer: (c).bandwidth
Question 146. Average responding voltmeter is cheap and accurate.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 147. Low voltage signals can be measured by ___________
  1.    amplifiers
  2.    transformers
  3.    transducers
  4.    voltmeters
 Discuss Question
Answer: Option A. -> amplifiers
Answer: (a).amplifiers
Question 148. Sensitivity is of the order of ________
  1.    MV
  2.    V
  3.    GV
  4.    mV
 Discuss Question
Answer: Option D. -> mV
Answer: (d).mV
Question 149. Electronic multimeter measures ________
  1.    voltage, current and resistance
  2.    voltage and current
  3.    current and power
  4.    energy and power
 Discuss Question
Answer: Option A. -> voltage, current and resistance
Answer: (a).voltage, current and resistance
Question 150. Response of thermocouples is fast.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option B. -> False
Answer: (b).False

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