A Wheatstone bridge is a type of bridge circuit used
Chapter 26, Problem 26.69(choose chapter or problem)
A Wheatstone bridge is a type of bridge circuit used tomake measurements of resistance. The unknown resistance tobe measured, R x , is placed in the circuit with accuratelyknown resistances R i ,R 2, and R 3 (Fig. 26-65). One of these,, is a variable resistor which is adjusted so that when theswitch is closed momentarily, the ammetercurrent flow, (a) DetermineR x in terms of R, R2, andR 3. (b) If a Wheatstonebridge is balanced whenR\ = 6 300, #2 = 9 7 2 0 ,and R3 = 78.6 fi, whatis the value of theunknown resistance?FIGURE 26-65 71 and 72.Wheatstone bridge.
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