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Higher Science (5's) (Physics) Quiz on P5 (Higher bits), created by hannah.pickard on 04/22/2013.

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hannah.pickard
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P5 (Higher bits)

P5 (Higher bits)

Question 1 of 3

1

Why do resistors get hotter when there is an electric current through them?

Select one of the following:

  • collisions between moving charges and stationary ions in the wire cause a heating effect

  • energy from the current is wasted as heat

Explanation

Question 2 of 3

1

Why does the potential difference across two or more components add up to the potential difference across the battery?

Select one of the following:

  • none of it is wasted

  • the work done in each unit of charge in the battery must equal the work done in the components

Explanation

Question 3 of 3

1

Why is the potential difference largest across the component with the most resistance?

Select one of the following:

  • more work is done by the charge moving through a large resistance than a smaller one

  • it takes more energy to move across a bigger resistance

Explanation

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