A cylinder of a material is 10 cm long and has a cross section of 2 centimetre square what will be its resistivity
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Explanation:
Length L = 10 cm
Cross-section A = 2 cm2.
Resistance R = 20 ohm
We have R = ρL/A, where ρ is the resistivity.
ρ = RA/L = 20 x 2/10 = 4 ohm. m
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