Explain process of wheatstone bridge, Physics

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In a Wheatstone bridge PQRS, a galvanometer is connected among Q and S and a voltage source between P and R.

An unknown resistor Rx is connected among P and Q.

When the bridge is balanced, the resistance among Q and R is 200Ω, that between R and S is 10Ω and that among S and P is 150Ω.

Calculate the value of Rx .

 


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