Question

Part A What is the resistance of a 4.4 m length of copper wire 1.3 mm n diameter? The resistivity of copper is 1.68x 10-8 Ω-m Express your answer to two significant figures and include the appropriate units.

Answer 1

Step-by-step explanation:

It is given that,

Length of the copper wire, l = 4.4 m

Diameter of copper wire, d = 1.3 mm = 0.0013 m

Radius of copper wire, r = 0.00065 m

The resistivity of the copper wire,
`\rho=1.68* 10^(-8)\ \Omega-m`

We need to find the resistance of the copper wire. It is given by :

`R=\rho(l)/(A)`

`R=1.68* 10^(-8)\ * (4.4\ m)/(\pi (0.00065)^2)`

R =0.055 ohms

So, the resistance of the copper wire is 0.055 ohms. Hence, this is the required solution.