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

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

Question 2. What is DC short for?

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

Question 3. Which type of device is used to step up or step down an AC supply?

A transmitter.
A transcriber.
A transformer.
A transducer.

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

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

Question 5. If an AC supply flows back and forth 3,000 times per minute what is its frequency?


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