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. Why do we step up the potential difference for transmitting electricity?

It's more efficient.
It's safer.
It's to stop people tampering with the cables.
It causes more current to flow.


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

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


Question 3. How does a transformer produce a current in a secondary coil?

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


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?

2V.
64V.
32V.
16V.


Question 5. Why do we step down the potential difference for for use in our homes?

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


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