Yes, there is some loss when electrical power is "stepped up" to a higher voltage. This process typically involves using a device called a transformer. The transformer increases the voltage while decreasing the current to maintain the same amount of power, as power is the product of voltage and current (P = V * I). The conservation of power means that when voltage is increased, current must decrease, and vice versa.
In first case if we will use formula for power P=V2/R then power loss comes 144kW whereas if we use formula P=I2R then it comes out 100kW. Why such difference?
Hi. I am about to teach my students about loss of power in transmission. I have a doubt. Suppose in the first case, the voltage is 200 Volts (and not 240V). The current comes out to be 600A. And the power loss comes out to be 144KW. But the power generated by the station is 120 KW. So how do I explain the loss of extra 24KW? Thanks.
Even though your calculations show power loss > input power, it doesn't mean that when you try to transfer the power the loss will be 144kw it will be 120kw only, the extra 24kw is the value is to be compensated by increasing voltage level or add another supply after which you can supply the load
thank you
Is there loss when the power is "stepped up" to a higher voltage?
Yes, there is some loss when electrical power is "stepped up" to a higher voltage. This process typically involves using a device called a transformer. The transformer increases the voltage while decreasing the current to maintain the same amount of power, as power is the product of voltage and current (P = V * I). The conservation of power means that when voltage is increased, current must decrease, and vice versa.
@@iitutorcom thank you for the quick reply
In first case if we will use formula for power P=V2/R then power loss comes 144kW whereas if we use formula P=I2R then it comes out 100kW. Why such difference?
The 240V drop isn't just over the transmission line - it is also over whatever load is attached.
Hi. I am about to teach my students about loss of power in transmission. I have a doubt. Suppose in the first case, the voltage is 200 Volts (and not 240V). The current comes out to be 600A. And the power loss comes out to be 144KW. But the power generated by the station is 120 KW. So how do I explain the loss of extra 24KW? Thanks.
how can the power loss be greater than the power generated? Its either theres something wrong with the input given or you made the wrong derivation
I think then it actually won't be able to transmit that current
Even though your calculations show power loss > input power, it doesn't mean that when you try to transfer the power the loss will be 144kw it will be 120kw only, the extra 24kw is the value is to be compensated by increasing voltage level or add another supply after which you can supply the load
Its an unrealisable system, bcoz you have rload in series with 0.4 ohm transmission line, even with 0 rload you can create maximum of 500mA with 200V.