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?

Ra and Rd are the opposite arms of a Wheatstone bridge as are Rc and R

1.	R_a and R_d are the opposite arms of a Wheatstone bridge as are R_c and R_b. The source voltage is applied across R_a and R_c. Then when the bridge is balanced which one of the following is true?
A.	R<sub>a</sub> = R<sub>c</sub> R<sub>d</sub>/R<sub>b</sub>
B.	R<sub>a</sub> = R<sub>b</sub> R<sub>c</sub>/R<sub>d</sub>
C.	R<sub>a</sub> = R<sub>b</sub> Rd/R<sub>c</sub>
D.	R<sub>a</sub> = R<sub>b</sub> + R<sub>c</sub> + R<sub>d</sub>
Answer» C. R<sub>a</sub> = R<sub>b</sub> Rd/R<sub>c</sub>

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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?

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?

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R_a and R_d are the opposite arms of a Wheatstone bridge as are R_c and R_b. The source voltage is applied across R_a and R_c. Then when the bridge is balanced which one of the following is true?