Search any question & find its solution
Question:
Answered & Verified by Expert
In a balanced meter bridge, the segment of wire opposite to a known resistance of \(70 \Omega\) is \(70 \mathrm{~cm}\). The unknown resistance is
Options:
Solution:
1565 Upvotes
Verified Answer
The correct answer is:
\(30 \Omega\)
In balanced meter bridge known resistance,
\(S=70 \Omega, l=70 \mathrm{~cm}\)
\(\therefore\) Unknown resistance,
\(R=S\left(\frac{100-l}{l}\right)=\frac{70(100-70)}{70}=30 \Omega\)
\(S=70 \Omega, l=70 \mathrm{~cm}\)
\(\therefore\) Unknown resistance,
\(R=S\left(\frac{100-l}{l}\right)=\frac{70(100-70)}{70}=30 \Omega\)
Looking for more such questions to practice?
Download the MARKS App - The ultimate prep app for IIT JEE & NEET with chapter-wise PYQs, revision notes, formula sheets, custom tests & much more.