Snapquiz - AC vs DC

Question 1. Why do we use AC for mains electricity?

AC electricity flows back and forth from the supply.
It's the agreed international standard way to generate electricity.
It's less dangerous than DC.
It's easy to generate and can be distributed efficiently.

Question 2. Which analogy is similar to a DC supply?

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

Question 3. What is AC short for?

Additional Current.
Alternating Current.
Actual Current.
Actuating Current.

Question 4. Which analogy is similar to an AC supply?

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

Question 5. What is DC short for?

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

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