Question: Ra and Rd are the opposite arms of a Wheatstone bridge as are Rc and Rb. The source voltage is applied across Ra and Rc. Then when the bridge is balanced which one of the following is true?
Options
A : Ra = Rc Rd/Rb
B : Ra = Rb Rc/Rd
C : Ra = Rb Rd/Rc
D : Ra = Rb + Rc + Rd
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