Snapquiz - Transformers

Question 1. Which of the following is not an advantage of switch mode transformers?

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

Question 2. 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?

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

Question 3. 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.
2A.
16A.

Question 4. The primary coil has 9000 turns and a current of 2A. The secondary coil has 3000 turns. What is the current in the secondary coil?

0.67A.
4A.
6A.
0.33A.

Question 5. How does a transformer produce a current in a secondary coil?

It's induced by the field produced by the primary coil.
The core conducts the current to the secondary coil.
It's induced by the field produced by the secondary coil.
The primary coil is electrically connected to the secondary coil.

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