NEET Physics Wheatstone Bridge MCQ Question
If a Wheatstone bridge is balanced and the resistances are R1 = 10 Ω, R2 = 15 Ω, and R3 = 20 Ω, what should be the value of R4?
30 Ω
25 Ω
35 Ω
20 Ω
Correct Answer
Detailed Explanation
In a balanced Wheatstone bridge, the balance condition is R1/R2 = R3/R4. Substituting the given values, 10/15 = 20/R4. Solving for R4 gives R4 = 30 Ω.
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