Question

The primary function of a Wheatstone bridge is to measure:

• A. Voltage
• B. Current
• C. Resistance
• D. Inductance

Hint:

The Wheatstone bridge is a highly accurate method for measuring an unknown resistance by comparing it with known resistances.

Answer 1

The Correct Option is C

The Wheatstone bridge is a fundamental electrical circuit used to measure an unknown resistance by balancing two legs of a bridge circuit. Step 1: Understanding the Wheatstone Bridge. 
The Wheatstone bridge consists of four resistors arranged in a diamond shape with a voltage source applied across the bridge. The bridge is "balanced" when the ratio of resistances in one leg equals the ratio in the other leg, making the potential difference between the middle points (across a galvanometer) equal to zero. 
Step 2: Measuring Resistance. 
The primary use of the Wheatstone bridge is to precisely measure unknown resistances by adjusting the known resistors until the bridge is balanced. 
Step 3: Examining the Options.
(a) Voltage: The Wheatstone bridge does not measure voltage directly.
(b) Current: The Wheatstone bridge is not used to measure current.
(c) Resistance: The Wheatstone bridge is specifically designed to measure resistance.
(d) Inductance: The Wheatstone bridge does not measure inductance. 
Step 4: Conclusion. The Wheatstone bridge is primarily used for measuring resistance. Thus, the correct answer is (c) Resistance.