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

Question 2. Which of the following is not an advantage of switch mode transformers?

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

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?


Question 4. What is the benefit of using an AC supply?

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

Question 5. Which substance can we place inside an electromagnet to make it stronger?


If you would like to track your scores, please enter your preferred first name into the box (please note, this uses cookies to store the data on your computer/phone/tablet - please see the FAQ for more information). Alternatively, if your teacher has given you a code starting with a # symbol, you can enter that:

Snapquiz© CJ Thornton    Terms and Conditions    Privacy

Log out