Exercise 11

Measuring a resistance with the Wheatstone bridge

In a Wheatstone bridge the resistor $R_{1} = 120 Ω$ connects the node $A$ to the node $C$ , the resistor $R_{2} = 360 Ω$ connects $C$ to the node $B$ , the resistor $R_{3} = 50 Ω$ connects $A$ to the node $D$ and the unknown resistor $R_{x}$ connects $D$ to $B$ . The source is connected between $A$ and $B$ , and a galvanometer connected between $C$ and $D$ carries no current. Compute $R_{x}$ .

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