Snapquiz - AC vs DC

Question 1. Which analogy is similar to an AC supply?

The wind blowing in different directions every day.
The waves on the sea moving up and down at random.
A river flowing in the same direction all the time.
The tide regularly coming in and going back out again.

Question 2. What is the mains potential difference and frequency in the U.K?

230V, 60Hz.
110V, 60Hz.
230V, 50Hz.
110V, 50Hz.

Question 3. If an AC supply flows back and forth 3,000 times per minute what is its frequency?

3,000Hz.
50Hz.
60Hz.
180,000Hz.

Question 4. Which analogy is similar to a DC supply?

A river flowing in the same direction all the time.
The wind blowing in different directions every day.
The tide regularly coming in and going back out again.
The waves on the sea moving up and down at random.

Question 5. What would a DC supply look like on an oscilloscope?

A straight line remaining at a potential difference of zero over time.
A straight line remaining at a single non-zero potential difference over time.
A curved line starting at a high positive potential difference then steadily falling to zero.
A wave going from positive to negative over time.

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: