Questions
In a Wheatstone's bridge, three resistances P, Q and R are connected in the three arms and fourth arm is formed by two resistances S1, and S2, connected in parallel. The condition for the bridge to be balanced will be
detailed solution
Correct option is B
See fig.For balanced Wheatstone's bridgePQ=RS…………(1)Here S=S1∥S2Substituting the value of S from eq. (2) in eq. [1), we getPQ=RS1S2/S1+S2=RS1+S2S1S2Talk to our academic expert!
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Seven resistances are connected as shown in the figure. The equivalent resistance between A and B is
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