NEET Physics Wheatstone Bridge MCQ Question
In a balanced Wheatstone bridge, if the resistors are arranged such that R1 = 10 Ω, R2 = 5 Ω, and R3 = 20 Ω, what should be the resistance of R4 to maintain the balance?
4 Ω
10 Ω
8 Ω
5 Ω
Correct Answer
Detailed Explanation
For a balanced Wheatstone bridge, the condition R1/R2 = R3/R4 must be satisfied. Here, 10/5 = 20/R4, which gives R4 = 4 Ω.
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