Podcast
Questions and Answers
What does the Wheatstone bridge primarily measure?
What does the Wheatstone bridge primarily measure?
- Current flowing through a resistor
- Voltage across a conductor
- Resistance of a conductor (correct)
- Capacitance of a circuit
According to the principle of the Wheatstone bridge, when is the deflection of the galvanometer null?
According to the principle of the Wheatstone bridge, when is the deflection of the galvanometer null?
- When all resistors have the same value
- When the ratio of two adjacent resistances is equal to the ratio of the other two (correct)
- When $P + Q = R + S$
- When the resistances are in series
Which of the following components is part of the Wheatstone bridge setup?
Which of the following components is part of the Wheatstone bridge setup?
- Capacitor
- Inductor
- Transformer
- Galvanometer (correct)
In the formula $ rac{P}{Q} = rac{R}{S}$, what do P and Q represent?
In the formula $ rac{P}{Q} = rac{R}{S}$, what do P and Q represent?
In the Wheatstone bridge, what roles do K₁ and K₂ serve?
In the Wheatstone bridge, what roles do K₁ and K₂ serve?
Study Notes
Wheatstone Bridge
- Sir Charles Wheatstone invented the Wheatstone bridge, an electrical circuit used to measure an unknown electrical resistance.
- The bridge consists of four resistors arranged in a quadrilateral.
- The principle behind the Wheatstone bridge is based on the null deflection method.
- The bridge is balanced when there is no current flowing through the galvanometer.
- The key fact is that the ratio of two adjacent resistances in the quadrilateral is equal to the ratio of the resistances of the other two sides, when the bridge is balanced.
- This is represented by the formula $ \frac{P}{Q} = \frac{R}{S} $ where P, Q, R, and S are the resistance values of the four resistors in the bridge.
- The point where the galvanometer is connected is denoted by G.
- There are two keys, K₁ and K₂ in the circuit.
- The points of connection for the galvanometer and the unknown resistor are represented by C and D.
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Description
This quiz explores the Wheatstone bridge, an electrical circuit used to measure unknown resistances. It covers the structure, principle, and formula associated with the Wheatstone bridge. Test your understanding of its components and balancing method through this engaging quiz.
