Question

a cylinder of a material 10 cm long has a cross section of 2 cm square if its resistance along the length be 20 ohm what will be its resistivity in numbers and unit​

Answer 1

Answer:

4 ohm.m

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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