- #1
bonbon22
- 92
- 5
- Homework Statement
- The National Grid uses high-voltage transmission lines to carry electrical power
around the UK. A particular transmission line delivers 800 MW of power at
132 kV to the user. It loses 1% of the transmitted power as heat.
What is the resistance of the transmission line?
[1 mark]
A 0.2 Ω
B 6 Ω
C 20 Ω
D 2000 Ω
- Relevant Equations
- V^2/R = P
I understand how to get the answer but i don't understand how the answer 0.2 ohms is equal to the resistance of the transmission lines
If V^2/P = R then (132kV)^2/800MW = the resistance of the transmission lines, why is the 1% tansmitted as heat relevant at all as this is just one form of energy released from the resistance ?
If V^2/P = R then (132kV)^2/800MW = the resistance of the transmission lines, why is the 1% tansmitted as heat relevant at all as this is just one form of energy released from the resistance ?