CUET · PHYSICS · PYQ PAPER 2023
What is the conductivity of a wire of resistance \(0.05 \Omega\), area of cross section \(2 \times 10^{-4} m^2\) and length 50 cm ?
- A \(5 \times 10^2 \Omega^{-1} m^{-1}\)
- B \(5 \times 10^3 \Omega^{-1} m^{-1}\)
- C \(5 \times 10^4 \Omega^{-1} m^{-1}\)
- D \(5 \times 10^{-3} \Omega^{-1} m^{-1}\)
Answer & Solution
Correct Answer
(C) \(5 \times 10^4 \Omega^{-1} m^{-1}\)
Step-by-step Solution
Detailed explanation
\(\sigma = \frac{L}{RA}\) \(\sigma = \frac{0.5}{0.05 \times 2 \times 10^{-4}}\) \(\sigma = 5 \times 10^4 \Omega^{-1} m^{-1}\)
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