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Bridge sensitivity is defined as _________(a) \(S_B=\frac{\theta}{R}\)(b) \(S_B=\frac{\theta}{\Delta R}\)(c) \(S_B=\frac{1}{\frac{\Delta R}{R}}\)(d) \(S_B=\frac{\theta}{\frac{\Delta R}{R}}\)I had been asked this question by my college professor while I was bunking the class.The above asked question is from Sensitivity of Wheatstone Bridge in chapter Measurement of Resistance of Electrical Measurements

Answer»

Right ANSWER is (d) \(S_B=\frac{\theta}{\frac{\DELTA R}{R}}\)

Easiest explanation: The bridge sensitivity is defined as the amount of deflection of the galvanometer per unit FRACTIONAL change in the UNKNOWN resistance.

\(S_B=\frac{\theta}{\frac{\Delta R}{R}}\)

Here ∆R/R denotes the fractional change in the unknown resistance.


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