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MCQs

Total Questions : 141 | Page 6 of 15 pages
Question 51. What is the effect of load and contact resistance in Kelvin bridge?
  1.    independent
  2.    fully dependent
  3.    partially dependent
  4.    depends on the resistance value
 Discuss Question
Answer: Option A. -> independent
Answer: (a).independent
Question 52. What is the condition to achieve a high sensitivity in a Kelvin bridge?
  1.    low voltage
  2.    high power
  3.    medium resistance
  4.    high current
 Discuss Question
Answer: Option D. -> high current
Answer: (d).high current
Question 53. The relation between ratio of resistance arms and ratio of resistance arms of second bridge is _________
  1.    unequal
  2.    equal
  3.    twice
  4.    one forth
 Discuss Question
Answer: Option B. -> equal
Answer: (b).equal
Question 54. Why Kelvin bridge is used for measurement of low resistance?
  1.    due to e.m.f source used
  2.    due to a large current flow
  3.    due to contact and lead resistance
  4.    due to power dissipation across the circuit
 Discuss Question
Answer: Option C. -> due to contact and lead resistance
Answer: (c).due to contact and lead resistance
Question 55. Kelvin bridge can be calibrated to read _________
  1.    inductance and Quality factor value
  2.    capacitance only
  3.    power and voltage
  4.    current and frequency
 Discuss Question
Answer: Option A. -> inductance and Quality factor value
Answer: (a).inductance and Quality factor value
Question 56. Why can’t a Kelvin bridge be used for the measurement of low Quality factor value?
  1.    due to thermoelectric effect
  2.    due to balance problem
  3.    due to the dull detector used
  4.    due to temperature
 Discuss Question
Answer: Option B. -> due to balance problem
Answer: (b).due to balance problem
Question 57. Megger is a ________
  1.    source of e.m.f
  2.    source to measure high resistance
  3.    type of a null detector
  4.    current carrier
 Discuss Question
Answer: Option B. -> source to measure high resistance
Answer: (b).source to measure high resistance
Question 58. Megger works on the principle of ________
  1.    kirchhoff’s current laws
  2.    ohm’s law
  3.    gauss’s law
  4.    electromagnetic induction
 Discuss Question
Answer: Option D. -> electromagnetic induction
Answer: (d).electromagnetic induction
Question 59. Megger is also used for ________
  1.    providing additional e.m.f
  2.    bridge balance
  3.    testing insulation resistance
  4.    controlling the temperature
 Discuss Question
Answer: Option C. -> testing insulation resistance
Answer: (c).testing insulation resistance
Question 60. High resistances are of the order of __________
  1.    0.1 Mῼ
  2.    10 mῼ
  3.    1 kῼ
  4.    10 Gῼ
 Discuss Question
Answer: Option A. -> 0.1 Mῼ
Answer: (a).0.1 Mῼ

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