I am having trouble understanding transformers!!
Here is the problem I have to solve:
A protable CD player requires 12 volts to operate. A transformer allows the device to be powered from a 120-volt outlet. If the primary has 500 turns, how many turns should the secondary have?
This is how I set it up:
(primary voltage)/(number of primary turns) = (secondary voltage)/(number of secondary turns)
12/500 = 120/5000
but I have no idea if I am on the right track!
U1/U2 =N1/N2
N2 =N1•U2/U1 =500•12/120 = 50
You are on the right track!
To solve this problem, you correctly set up the equation using the transformer equation: (primary voltage)/(number of primary turns) = (secondary voltage)/(number of secondary turns).
Let's break it down step by step:
1. Given: primary voltage = 12 volts, primary turns = 500, and secondary voltage = 120 volts.
2. Substitute the given values into the equation: 12/500 = 120/x, where x represents the number of secondary turns.
3. Cross multiply: 12 * x = 500 * 120.
4. Simplify: 12x = 60,000.
5. Divide both sides by 12: x = 60,000/12.
6. Calculate: x = 5,000.
So, the number of turns the secondary should have is 5,000.
Therefore, you're on the right track, and the correct answer is 5,000 turns for the secondary.