Question: how to calculate output potential difference?
Answer: So we have 20 volts as 𝑉 𝑝 multiplied by 50, that's 𝑛 𝑠, divided by 200, that's 𝑛 𝑝. And then, when we evaluate the left-hand side of the equation, we find that 𝑉 sub 𝑠 is equal to five volts. In other words, the output potential difference for this transformer is five volts.