Question

The resistance can be measured most accurately by:

• A. Voltmeter-ammeter method
• B. Bridge method
• C. Multi-meter
• D. Megger

Hint:

For precise resistance measurement, especially in labs, always prefer the bridge method over voltmeter-ammeter or multimeters.

Answer 1

The Correct Option is B

Among all methods listed, the bridge method (like Wheatstone Bridge or Kelvin’s Double Bridge) provides the most accurate measurement of resistance.
It works on the principle of null deflection, eliminating errors due to the resistance of connecting wires and contact resistance.
The voltmeter-ammeter method is less accurate due to the influence of meter internal resistances.
Multimeters are convenient but not as precise, especially at very low or high resistance values.
Meggers are primarily used for high insulation resistance and not precise resistance measurements.