Opposite Ends of Wheatstone Bridge

Introduction: Wheatstone bridge is an electrical circuit used to measure an unknown resistance. It consists of four resistors connected in a diamond shape with a voltage source applied across the two opposite corners, and a null detector connected across the other two.

Opposite Ends of Wheatstone Bridge: The two opposite ends of a Wheatstone bridge are:

- Electromotive Force (EMF): It is the voltage source applied across the two opposite corners of the bridge. It is a device that converts chemical, mechanical, or other forms of energy into electrical energy.

- Null Detector: It is a device used to detect the balance or null point of the Wheatstone bridge. It is connected across the other two opposite corners of the bridge. The null detector may be a galvanometer, a digital multimeter, or any other device that can detect small voltage differences.

Other Components of Wheatstone Bridge: The other two components of a Wheatstone bridge are:

- Known Resistance: Two of the four resistors in the bridge are known resistors, which are used to balance the bridge.

- Unknown Resistance: The remaining resistor in the bridge is the unknown resistor, whose value is to be measured.

Working of Wheatstone Bridge: When the Wheatstone bridge is balanced, the current through the galvanometer is zero, indicating that the voltage across the two opposite corners of the bridge is equal. At this point, the ratio of the two known resistors is equal to the ratio of the unknown resistor to the fourth resistor.

Conclusion: In conclusion, the opposite ends of a Wheatstone bridge consist of an EMF and a null detector. The EMF provides the voltage source, and the null detector detects the balance or null point of the bridge. The Wheatstone bridge is a useful circuit for measuring unknown resistances accurately.