The resistance of a pieces of wire of lenght 20... - JAMB Physics 2005 Question
The resistance of a pieces of wire of lenght 20m are crossed-sectional area 8 x 10 6m2is?
[Resistivity of the wire = 4 x 10-7 Ω m]
[Resistivity of the wire = 4 x 10-7 Ω m]
A
5.0 Ω
B
0.5 Ω
C
10.0 Ω
D
1.0 Ω
correct option: d
since resistance R = p (l)/a
= (4 x 10-7 x 20)/8.0 x 10-6
R = 1.0 Ω
= (4 x 10-7 x 20)/8.0 x 10-6
R = 1.0 Ω
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