AP EAMCET · PHYSICS · Current Electricity
Find the resistance of a cube of edge \(60 \mathrm{~cm}\), made of a material of specific resistance \(60 \times 10^{-8} \Omega \mathrm{m}\).
- A \(2.5 \times 10^{-5} \Omega\)
- B \(10^{-8} \Omega\)
- C \(10^{-6} \Omega\)
- D \(5 \times 10^{-4} \Omega\)
Answer & Solution
Correct Answer
(C) \(10^{-6} \Omega\)
Step-by-step Solution
Detailed explanation
Given, side of cube, \(l=60 \mathrm{~cm}\) \[ =60 \times 10^{-2} \mathrm{~m} \] Resistivity, \(\rho=60 \times 10^{-8} \Omega-\mathrm{m}\) \(\because\) Resistance, \(R=\frac{\rho l}{A}\)…
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