A Wheatstone bridge is a circuit that is used to measure the resistance of a single resistor. It consists of three resistors connected in a closed loop. Two...
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A Wheatstone bridge is a circuit that is used to measure the resistance of a single resistor. It consists of three resistors connected in a closed loop. Two of these resistors are connected to a power source, while the third resistor is connected to a variable current source.
When a varying current is passed through the variable current source, it causes the resistance of the middle resistor to change. This change in resistance is detected by the voltmeter and used to calculate the resistance of the unknown resistor.
Meter Bridge:
A meter bridge is a device used to measure the resistance of a single resistor. It consists of two identical resistors connected in a closed loop. One of these resistors is connected to a power source, while the other is connected to a variable current source.
The two resistors are connected to a galvanometer. The galvanometer is a device that is used to measure the current flowing through a circuit.
When a varying current is passed through the variable current source, it causes the resistance of the two resistors to change in the same way as it does in the Wheatstone bridge. This change in resistance is detected by the galvanometer and used to calculate the resistance of the unknown resistor