The electricity that is delivered to our homes from regional generating stations moves over transmission lines that are
high voltage and low current
high voltage and high current
low voltage and high current
low voltage and low current

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:

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.

2b2t

explanation:

2b2t

when jerome paddle in flowing river towards east the net speed of jerome will increase

so the net speed of jerome will be given as

now the speed of paul will be same as it is given as he is running on the ground

so

so here we can say since the speed of jerome is more so he will win the race

now as we know the distance so the time difference is given as

so jerome will reach first and the time difference will be 203.55 s or 3.4 min