Question

The electrical system that provides power to your school has two major parts: The transmission line which sends power to your local area and the distribution lines which transmit the power locally. For safety and efficiency, the voltage must be ______________ in the transmission lines and ____________ in the distribution lines.

Answer 1

The answer is below

Step-by-step explanation:

Because of the resistance of transmission lines, high current along the line leads to large voltage drop. This voltage drop causes low efficiency because the voltage at the receiving end is far less than that at the sending end.

Therefore there is need to transmit at a higher voltage (smaller current) than that required by distribution because of efficiency.

Hence, For safety and efficiency, the voltage must be large in the transmission lines and small in the distribution lines.