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MCQs

Total Questions : 109 | Page 10 of 11 pages
Question 91. In Maxwell’s capacitance bridge for calculating unknown inductance, the various values at balance are, R₁ = 300 Ω, R₂ = 700 Ω, R₃ = 1500 Ω, C₄ = 0.8 μF. Calculate R₁, L₁ and Q factor, if the frequency is 1100 Hz.
  1.    240 Ω, 0.12 H, 3.14
  2.    140 Ω, 0.168 H, 8.29
  3.    140 Ω, 0.12 H, 5.92
  4.    240 Ω, 0.36 H, 8.29
 Discuss Question
Answer: Option B. -> 140 Ω, 0.168 H, 8.29
Answer: (b).140 Ω, 0.168 H, 8.29
Question 92. Bridge is suitable for _________
  1.    coils with high Q values
  2.    coils with low Q values
  3.    coils with intermediate Q values
  4.    coils with very high Q values
 Discuss Question
Answer: Option B. -> coils with low Q values
Answer: (b).coils with low Q values
Question 93. Wagner device is a ____________
  1.    capacitance bridge
  2.    resistance bridge
  3.    inductance bridge
  4.    impedance bridge
 Discuss Question
Answer: Option A. -> capacitance bridge
Answer: (a).capacitance bridge
Question 94. Which is the guarding arm?
  1.    parallel RC combination
  2.    series RC combination
  3.    resistance R
  4.    capacitance C
 Discuss Question
Answer: Option B. -> series RC combination
Answer: (b).series RC combination
Question 95. The output power of an oscillator is not enough to drive power circuits.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option B. -> False
Answer: (b).False
Question 96. Bridge balance equation for magnitude is given by which of the following relation?
  1.    Z₁ Z₄ = Z₂ Z₃
  2.    Z₁ Z₂ = Z₃ Z₄
  3.    Z₂ Z₄ = Z₁ Z₃
  4.    Z₁ Z₃ = Z₂ Z₄
 Discuss Question
Answer: Option A. -> Z₁ Z₄ = Z₂ Z₃
Answer: (a).Z₁ Z₄ = Z₂ Z₃
Question 97. Tuned amplifier circuits respond to broad bandwidth at bridge frequency.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option B. -> False
Answer: (b).False
Question 98. Angular balance equation is given by which of the following relation?
  1.    θ₁ × θ₄ = θ₂ × θ₃
  2.    θ₁ + θ₄ = θ₂ + θ₃
  3.    θ₂ + θ₄ = θ₁ + θ₃
  4.    θ₂ × θ₄ = θ₁ × θ₃
 Discuss Question
Answer: Option B. -> θ₁ + θ₄ = θ₂ + θ₃
Answer: (b).θ₁ + θ₄ = θ₂ + θ₃
Question 99. Tuned amplifiers can be set to _______
  1.    low frequencies
  2.    high frequencies
  3.    any frequency
  4.    audio frequencies
 Discuss Question
Answer: Option C. -> any frequency
Answer: (c).any frequency
Question 100. Unknown capacitance value is obtained by _________
  1.    comparison with standard
  2.    using a tuned detector
  3.    using capacitance of other ratio arms
  4.    using a vibration galvanometer
 Discuss Question
Answer: Option A. -> comparison with standard
Answer: (a).comparison with standard

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