# Calculating Electrical Energy Loss in 2 Ohm Cable

• nekteo
In summary, a cable with a total resistance of 2 ohms is used to transfer 15000W of electrical power with an electrical potential of 10000V. After transferring 2 hours of electrical power, the cable loses 3V over its length, resulting in a total energy loss of 32400 J. The voltage at the other end of the cable is 9,997V.
nekteo
a cable with total resistance of 2 ohms used to transfer 15000W of electrical power with electrical potential of 10000 V.
How much electrical energy is lose in the cable after transferring 2 hours of electrical power?

------------this is how my teacher taught me, but still confused----------
P = VI
15000 = 10000 I
I = 1.5 A

V = IR
V = 1.5 * 2
V = 3

E = VIt
E = 3 * 1.5 * (2 * 60 * 60)
E = 32400 J
-----------------------------------------------------------------------

What i don't understand is, since the question has provided me with 10000V, why should i find another voltage (1.5V)? It's impossible for a cable to have 2 completely different voltage (1.5V and 10000V) is it?
My question is, what is 1.5V and 10000V?
Why can't i just use,
E = Pt
E = 15000 * (2 * 60 * 60)?

HELP! I know my English is not good enough... sorry for that.

The "1.5" is not a voltage, it is a current. 1.5 amperes (1.5 A) means that 1.5 coulombs of charge pass by a given point in the wire every second.

You cannot use power alone to find transmission loss, because transmission loss depends only on current, not on power. If you use a higher voltage to transmit the same power, you will have smaller transmission losses.

- Warren

i'm sorry, erm... not 1.5, it's the 3V actually...(i'm confused!)
what is the voltage of 3 and 10000

The question told me the voltage is 10000, y still need to use formula, V = IR to find the V which is 3V?

What is the differences between the value of voltage provided by the question and the voltage get from the V = IR?

My physics is terrible huh??...

Last edited:
The cable loses 3V over it's length. At one end, the voltage is 10,000V; at the other it's 9,997V.

- Warren

o... now I get it! thanks for your help...

## 1. What is electrical energy loss?

Electrical energy loss refers to the loss of energy that occurs when electricity is transmitted through a medium, such as a cable. This can be caused by factors such as resistance, which converts electrical energy into heat.

## 2. How is electrical energy loss calculated?

Electrical energy loss is typically calculated using the formula E = I²R, where E is the energy loss in watts, I is the current in amps, and R is the resistance in ohms. This formula is based on Ohm's Law, which states that the current through a conductor is directly proportional to the voltage and inversely proportional to the resistance.

## 3. What is the significance of 2 ohm cable?

A 2 ohm cable is a type of electrical cable with a resistance of 2 ohms per unit length. This resistance value is important in determining the amount of energy loss that occurs when electricity is transmitted through the cable.

## 4. How does the length of the cable affect energy loss?

The longer the cable, the higher the resistance and therefore the higher the energy loss. This is because as the current travels through the length of the cable, it encounters more resistance, converting more energy into heat.

## 5. Can energy loss be reduced in a 2 ohm cable?

Yes, energy loss in a 2 ohm cable can be reduced by increasing the diameter of the cable or by using a material with lower resistance. This can be achieved by using a thicker or higher quality cable, which can handle higher currents with lower resistance, resulting in less energy loss.

Replies
29
Views
5K
Replies
7
Views
1K
Replies
31
Views
4K
Replies
7
Views
2K
Replies
2
Views
615
Replies
1
Views
1K
Replies
7
Views
2K
Replies
10
Views
2K
Replies
5
Views
2K
Replies
3
Views
2K