Cu and Al wire each of length l = 20 cm and area of cross-section A = 50 cm 2 . Their…
Physics · Class 12 · CBSE — Current Electricity
Cu and Al wire each of length l = 20 cm and area of cross-section A = 50 cm2. Their resistivity \(\rho_{Cu}\) = 1.69 \(\times\) 10-8 \(\Omega\) m and \(\rho_{Al}\) = 2.75 \(\times\) 10-8 \(\Omega\) m. If they are joined end to end, then the total resistance of the combination is:
- 0.01 \(\times\) 10-2
- 4.44
- 0.888
- 1 \(\times\) 10-2
Answer
(C) 0.888
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