Snapquiz - Transformers

This is the Snapquiz on Transformers. Click here or use the embedded video if you haven't watched the lesson yet.


Question 1. The primary coil has 1000 turns and a current of 2A. The secondary coil has 4000 turns. What is the current in the secondary coil?

8A.
0.5A.
16A.
2A.


Question 2. What is the benefit of using a core in a transformer?

It makes the transformer more powerful.
It makes the transformer heavier.
It makes the transformer more efficient.
It makes the transformer work.


Question 3. The primary coil has 9000 turns and a potential difference of 15V. The secondary coil has 3000 turns. What is the potential difference in the secondary coil?

30V.
10V.
5V.
45V.


Question 4. Why do we step down the potential difference for for use in our homes?

It's more efficient.
It reduces electricity bills.
It's safer.
It causes less current to flow.


Question 5. Which of the following is not an advantage of switch mode transformers?

They're low frequency.
They're cheap.
They're small and light.
They draw almost no power when not in use.


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