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


Question 2. Which substance can we place inside an electromagnet to make it stronger?

Copper.
Iron.
Aluminium.
Gold.


Question 3. What is the benefit of using an AC supply?

It's more efficient than DC.
It's safer than DC.
The changing current gives us a changing magnetic field.
The changing current gives us a stronger magnetic field.


Question 4. How can we induce a current in a conductor?

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


Question 5. What is the benefit of using a core in a transformer?

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


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