Answer:
high voltage and low current
Explanation:
Electricity is transmitted over transmission lines at very high voltages and low current.
The reason for this choice is to minimize the power dissipated along the transmission line. In fact, the dissipated power is given by:
\(P_{d} = I^2 R = \frac{P^2}{V^2}R\)
where
Pd is the dissipated power
I is the current
R is the resistance of the cables
V is the voltage
P is the generated power
From the first formula, we see that the dissipated power is proportional to the square of the current, so in order to minimize the loss of power, it is better to use low current. Moreover, from the second formula we see that the dissipated power is inversely proportional to the square of the voltage, so the higher the voltage, the less the power dissipated along the transmission lines.
