Answer: energy
Explanation: So the input and output of the power grid system is energy.
Answer:

Explanation:
In an ideal transformer, the ratio of the voltages is proportional to the ratio of the number of turns of the windings. In this way:

In this case:

Therefore, using the previous equation and the data provided, let's solve for
:

Hence, the number of loops in the secondary is approximately 41667.
Choice A is the right answer! Buy at high altitude and sell at low altitude
Hope this helps :)