Question
Question: Why is D.C. resistance for different wires measured using a Wheatstone bridge?...
Why is D.C. resistance for different wires measured using a Wheatstone bridge?
A
To calculate the power dissipated
B
To maintain a source of constant s...
C
To calculate the effective resistance
D
Check the quality of wire
Answer
To calculate the effective resistance
Explanation
Solution
A Wheatstone bridge is employed for highly accurate measurement of unknown electrical resistance. It operates on the null-deflection principle, balancing the unknown resistance against known resistances until zero current flows through the galvanometer, thus allowing precise determination of the wire's resistance.