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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 .
The cross-sectional areas of the pistons in the system shown below have a ratio of 25 to 1. If the maximum force that can be applied to the small piston is 12 N. What is the
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why horse shoe magnet is use in galvanometer
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