1: A generator produces electricity at about 21,600 V. This voltage needs to be increased to about 345,000 V via a transformer before being transmitted through the power grid. What is the ratio of windings between the secondary coil and the primary coil needed to do this

16:1

Explanation:

From the question,

Since the voltage of the transformer is increased, then the winding in the secondary coil is greater than the winding in the primary coil

Applying transformer's equation

Vs/Vp = Ns/Np Equation 1

Where Vs = Secondary voltage, Vp = primary Voltage, Ns/Np = Ratio of the winding between the secondary coil to the winding in the primary coil.

Given: Vs = 345000 V, Vp = 21600 V

Substitute these values into equation 1

Ns/Np = 345000/21600

Ns/Np = 16:1

answer; i believe the correct answer is (40,000 j) good luck