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MCQs

Total Questions : 141 | Page 11 of 15 pages
Question 101. The balance condition of a Wheatstone bridge depends on the _________
  1.    ratio of arms R₁ and R₁
  2.    ratio of arms R₃ and R₄
  3.    emf source and null detector
  4.    current source and power source
 Discuss Question
Answer: Option A. -> ratio of arms R₁ and R₁
Answer: (a).ratio of arms R₁ and R₁
Question 102. Balance condition can be obtained by _________
  1.    varying the standard resistance R₃
  2.    varying the resistance arms R₁ and R₂
  3.    keeping the unknown resistance R₄ constant
  4.    by making use of a null detector
 Discuss Question
Answer: Option B. -> varying the resistance arms R₁ and R₂
Answer: (b).varying the resistance arms R₁ and R₂
Question 103. Wheatstone bridge works on the principle of ________
  1.    full deflection
  2.    partial deflection
  3.    no deflection
  4.    null deflection
 Discuss Question
Answer: Option D. -> null deflection
Answer: (d).null deflection
Question 104. What is connected between the two ends of a Wheatstone bridge?
  1.    current and voltage source
  2.    ammeter and voltmeter
  3.    battery and galvanometer
  4.    ohmmeter and wattmeter
 Discuss Question
Answer: Option C. -> battery and galvanometer
Answer: (c).battery and galvanometer
Question 105. When the bridge is balanced, what is the current flowing through the galvanometer?
  1.    0
  2.    depends on the ratio arms R₁ and R₂
  3.    varies by a factor of 2
  4.    depends on the type of null detector used
 Discuss Question
Answer: Option A. -> 0
Answer: (a).0
Question 106. Amount of deflection of the galvanometer depends on _________
  1.    resistance of the ratio arms
  2.    sensitivity
  3.    current flowing through the bridge
  4.    emf across the circuit
 Discuss Question
Answer: Option B. -> sensitivity
Answer: (b).sensitivity
Question 107. The voltage sensitivity of a galvanometer is given by _________
  1.    Sᵥ = e⁄θ
  2.    Sᵥ = θ⁄e
  3.    Sᵥ = 1⁄e
  4.    Sᵥ = 1⁄θ
 Discuss Question
Answer: Option B. -> Sᵥ = θ⁄e
Answer: (b).Sᵥ = θ⁄e
Question 108. What is the relation between the sensitivity and deflection for a galvanometer?
  1.    directly proportional
  2.    inversely proportional
  3.    independant of each other
  4.    depends on the type of galvanometer used
 Discuss Question
Answer: Option A. -> directly proportional
Answer: (a).directly proportional
Question 109. Sensitivity is defined as _________
  1.    amount of voltage per unit current
  2.    amount of power per unit voltage
  3.    amount of resistance per unit voltage
  4.    amount of deflection per unit current
 Discuss Question
Answer: Option D. -> amount of deflection per unit current
Answer: (d).amount of deflection per unit current
Question 110. Sensitivity is expressed in _________
  1.    cm/A
  2.    m/mA
  3.    mm/µA
  4.    inch/nA
 Discuss Question
Answer: Option C. -> mm/µA
Answer: (c).mm/µA

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