JEE Mains · Physics · STD 12 - 3. current electricity
In meter bridge experiment for measuring unknown resistance ' \(S\) ', the null point is obtained at a distance \(30 cm\) from the left side as shown at point \(D\). If \(R\) is \(5.6 k \Omega\), then the value of unknown resistance ' \(S\) ' will be \(\Omega .\)
- A \(240\)
- B \(24\)
- C \(48\)
- D \(2400\)
Answer & Solution
Correct Answer
(D) \(2400\)
Step-by-step Solution
Detailed explanation
\(\frac{ S }{30}=\frac{5.6 \times 10^{3}}{70}\) \(S =\frac{3}{7} \times 5.6 \times 10^{3}=2400\)
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