Question

Calculate the resistance of aluminium wire of length 60cm and cross-sectional area 1mm2. the specificresistance of aluminium is 2.6*10-8 ohm-m.

Answer 1

R=ρ×(l)/(A)

l=length of wire=60 cm=0.6 m

A=1 mm²=1/(1000)² m² =10^(-6) m²

ρ=2.6×10^(-8) ohm m

Now,R= 2.6×(10^-8)×0.6/(10^-6) ohm

=0.0156 ohm