Question
Physics Question on Current electricity
P, Q, R, and S are four wires of resistances 3 Ω, 3 Ω, 3 Ω, and 4 Ω respectively. They are connected to form the four arms of a Wheatstone bridge circuit. The resistance with which S must be shunted in order that the bridge may be balanced is__________
Fill in the blank with the correct answer from the options given below.
A
14 Ω
B
12 Ω
C
15 Ω
D
7 Ω
Answer
7 Ω
Explanation
Solution
The correct shunt resistance to balance the Wheatstone bridge is 7 Ω, based on the ratio of resistances in both branches.