ANSWERS
1) The relationship in between the electrical energy carriesd by the transmission wires and the amount of the heat loss in it is due to the reason that when the electricity is flown through the wires there are some resistance found in these wires which creates a disturbance in the efficient flow of electricty.Also we know that current have an heating effect when it is in motion as due to if a large amount or magnitude of electricity is flown through the transmission wires it will carry a larger heat effected and also due to the resistance is provided by the wires and so the process of heat loss takes place.
2)It is important to minimize current in transmission wires due to minimize the heat loss and resistance on flowing electric current to make the system more efficient
3)Given Resistance = 250 ohms
Electric potential = 150 volts
so we know Power =
volt^2/Resistance =
=(150^2/250)(ohms/volts)
=(22500/250)watt = 90 watt
4)Heat energy (H) = Power(P)×Time(t)
4)Heat energy (H) = Power(P)×Time(t)= (90×2)joules = 180 joules
Hope it helps
