NEET Physics Wheatstone Bridge MCQ Question
In a balanced Wheatstone bridge setup, if the resistors are arranged such that R1 = 10 Ω, R2 = 20 Ω, and R3 = 15 Ω, what should be the value of R4 for the bridge to be balanced?
30 Ω
10 Ω
7.5 Ω
5 Ω
Correct Answer
Detailed Explanation
For a Wheatstone bridge to be balanced, the condition R1/R2 = R3/R4 must hold. Substituting the given values, 10/20 = 15/R4 gives R4 = 30 Ω.
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