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______ eliminates errors due to contacts and ______ in bridge measuring instruments.
  • a)
    Wheatstone Bridge, lead capacitances
  • b)
    Kelvin's Double bridge, lead resistances
  • c)
    Wheatstone bridge, lead inductances
  • d)
    Wheatstone Bridge, lead resistances
Correct answer is option 'B'. Can you explain this answer?
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______ eliminates errors due to contacts and ______ in bridge measurin...
Kelvin's Double bridge:
  • Kelvin Bridge is a modified Wheatstone bridge and provides high accuracy especially in the measurement of low resistance below 1 Ω.
  • The error introduced by the contact/lead resistance is quite large and hence, will give an inaccurate reading if measured through a Wheatstone bridge.
  • In order to avoid this problem, Kelvin's double bridge is used. It is so constructed that the contact resistance will not come into the picture while measuring the value of low resistance.
Advantages:
  • It can measure the resistance value in the range of 0.1 µA to 1.0 A.
  • Power consumption is less.
  • Simple in construction.
  • Sensitivity is high.
Construction:

 
  • The Kelvin double bridge uses a second set of ratio arms, which is why it is called a "double bridge" and has low resistance arms with four terminal resistors. The first ratio of the arm is P and Q, and the second ratio of the arm is p and q.
  • The Galvanometer is connected between P and p at point d. The point d is placed in the middle of the lead resistance r which is between unknown resistance R and standard resistance S. Thus, the effect of lead resistance r gets eliminated.
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______ eliminates errors due to contacts and ______ in bridge measuring instruments.a)Wheatstone Bridge, lead capacitancesb)Kelvins Double bridge, lead resistancesc)Wheatstone bridge, lead inductancesd)Wheatstone Bridge, lead resistancesCorrect answer is option 'B'. Can you explain this answer?
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______ eliminates errors due to contacts and ______ in bridge measuring instruments.a)Wheatstone Bridge, lead capacitancesb)Kelvins Double bridge, lead resistancesc)Wheatstone bridge, lead inductancesd)Wheatstone Bridge, lead resistancesCorrect answer is option 'B'. Can you explain this answer? for Electrical Engineering (EE) 2024 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about ______ eliminates errors due to contacts and ______ in bridge measuring instruments.a)Wheatstone Bridge, lead capacitancesb)Kelvins Double bridge, lead resistancesc)Wheatstone bridge, lead inductancesd)Wheatstone Bridge, lead resistancesCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for ______ eliminates errors due to contacts and ______ in bridge measuring instruments.a)Wheatstone Bridge, lead capacitancesb)Kelvins Double bridge, lead resistancesc)Wheatstone bridge, lead inductancesd)Wheatstone Bridge, lead resistancesCorrect answer is option 'B'. Can you explain this answer?.
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