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प्रश्न
What is the primary purpose of a Wheatstone bridge in electrical circuits?
विकल्प
To increase the voltage across a circuit
To reduce the power consumption in a circuit
To measure the current flowing through a battery
To determine an unknown resistance by comparing it with known resistances
MCQ
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उत्तर
A Wheatstone bridge is an arrangement of four resistors used to measure the resistance of one of them in terms of the other three. It was invented by Samuel Hunter Christie in 1833 and made famous by Sir Charles Wheatstone. The device operates on the principle of null deflection, where no current flows through the galvanometer when the bridge is balanced.
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