Numerical - Calculate smallest detectable change in resistance.

Q.  A highly sensitive galvanometer is used in Wheatstone bridge and it can detect a current as low as 80 pA. The resistances of each arm of bridge are 800 ohm and the resistance of galvanometer is 40 ohm. If an input of 20 V is applied to the bridge then the smallest change in resistance which can be detected is
- Published on 15 Sep 15

a. 10.752 μA
b. 15.280 μA
c. 17.351 μA
d. 23.719 μA

ANSWER: 10.752 μA

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    Discussion

  • Devies Mudebo   -Posted on 25 May 22
    Great work

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