Snapquiz - AC vs DC

This is the Snapquiz on AC vs DC. Click here or use the embedded video if you haven't watched the lesson yet.


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 would a DC supply look like on an oscilloscope?

A wave going from positive to negative 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 straight line remaining at a potential difference of zero over time.


Question 3. Which analogy is similar to a DC supply?

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


Question 4. What is DC short for?

Dangerous Current.
Dilute Current.
Device Current.
Direct Current.


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

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


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