GATE EE 2015 Set 1 — Question 15
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Electrical & Electronic Measurements → Bridges & Potentiometers → Error Analysis
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Question
When the Wheatstone bridge shown in the figure is used to find the value of resistor , the galvanometer indicates zero current when , and . If is known with tolerance on its nominal value of , what is the range of in Ohms?
Correct answer
(A) [123.50, 136.50]
Solution
For a balanced Wheatstone bridge, the condition is:Given and . The nominal value of is with a tolerance of .Calculating the range for :Thus, the range of is .
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