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

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

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

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

Question 3. How can we induce a current in a conductor?

Move the conductor relative to a magnetic field.
Wrap the conductor around a magnet.
Put the conductor next to a magnet.
Line a conductor up with magnetic field lines.

Question 4. The primary coil has 1000 turns and a potential difference of 8V. The secondary coil has 4000 turns. What is the potential difference in the secondary coil?


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

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

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