Question
Physics Question on Current electricity
Four resistors A,B,C and D form a Wheatstones bridge. The bridge is balanced, when C=100Ω. If A and B are interchanged, the bridge balances for C=121Ω. The value of D is
A
10Ω
B
100Ω
C
110Ω
D
120Ω
Answer
110Ω
Explanation
Solution
Balancing condition of bridge balance BA=x100 AB=x121 ∴x100=121x x2=12100 x=110Ω