TS EAMCET · Physics · Current Electricity
In a meter bridge the resistances \(R\) and \(S\) are such that the null point is found at a distance of \(40 \mathrm{~cm}\) from one end. If a resistance of \(10 \Omega\) is connected in parallel with shunt \(S\), then the null point occurs at \(90 \mathrm{~cm}\) from the same end. The values of the two resistances \(R\) and \(S\) respectively are
- A 83.33 & 125 Ohm
- B 125 & 83.33 Ohm
- C 73.33 & 150 Ohm
- D 150 & 73.33 Ohm
Answer & Solution
Correct Answer
(A) 83.33 & 125 Ohm
Step-by-step Solution
Detailed explanation
By the condition of a balanced Wheatstone bridge \(\frac{R}{S}=\frac{40}{100-40}=\frac{40}{60}=\frac{2}{3} \Rightarrow S=\frac{3 R}{2}\)...(i) Case II By the condition of a balanced Wheat stone bridge…
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