GATE EE 2025 Set 1 — Question 59
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Electrical & Electronic Measurements → Bridges & Potentiometers → Wheatstone & Kelvin Bridge
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Question
In the Wheatstone bridge shown below, the sensitivity of the bridge in terms of change in balancing voltage for unit change in the resistance , in mV/, is ______________ (round off to two decimal places).
Correct answer
1.94 to 2
Solution
The balancing voltage (Thevenin voltage across the detector terminals) is given by:The sensitivity of the bridge with respect to is defined as :Given values: , , .Converting to mV/:
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