Question

The resistivity of copper is 1.68 x 10^{-8}
W-m. The *resistance per unit length* (R/L) of a
certain copper cable is 1.61 x 10^{-5}W/m.

**(a)** What is the cross sectional area of the
cable?

**(b)** The above cable is used to transmit
electricity from a power station to an electrical substation 42.8
km distant. If the voltage at the substation is 2480 V,
what is the required voltage at the power station when the current
running through the cable is 856 A?

**(b)** What is the total heat energy deposited (in
Joules) in the wire in 1 hour?

Answer #1

A. Form the formula of the resistance we have a relationship as,

R = pL/A

Here p resistivity of copper =1.68× 10^-8 wm

L = length of the copper = 48.2km

A cross section area = to be find

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 4 minutes ago

asked 6 minutes ago

asked 23 minutes ago

asked 28 minutes ago

asked 44 minutes ago

asked 47 minutes ago

asked 52 minutes ago

asked 52 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago