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 would an AC supply look like on an oscilloscope? A straight line remaining at a single non-zero potential difference over time. A straight line remaining at a potential difference of zero over time. A wave going from positive to negative over time. A curved line starting at a high positive potential difference then steadily falling to zero.

Question 3. Which analogy is similar to a DC supply? The wind blowing in different directions every day. A river flowing in the same direction all the time. The tide regularly coming in and going back out again. The waves on the sea moving up and down at random.

Question 4. Which type of device is used to step up or step down an AC supply? A transmitter. A transducer. A transformer. A transcriber.

Question 5. Which analogy is similar to an AC supply? The wind blowing in different directions every day. A river flowing in the same direction all the time. The tide regularly coming in and going back out again. The waves on the sea moving up and down at random.

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