The resistance of a pieces of wire of length 20m are cros...
The resistance of a pieces of wire of length 20m are crossed-sectional area 8 x 10 -6m2is?
[Resistivity of the wire = 4 x 10-7 Ω m]
5.0 Ω
0.5 Ω
10.0 Ω
1.0 Ω
Correct answer is D
since resistance R = p (l)/a
= (4 x 10-7 x 20)/8.0 x 10-6
R = 1.0 Ω