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Description
Quiz by hannah.pickard, updated more than 1 year ago
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Created by hannah.pickard
over 11 years ago
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Question 1
Question
Why do resistors get hotter when there is an electric current through them?
Answer
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collisions between moving charges and stationary ions in the wire cause a heating effect
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energy from the current is wasted as heat
Question 2
Question
Why does the potential difference across two or more components add up to the potential difference across the battery?
Answer
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none of it is wasted
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the work done in each unit of charge in the battery must equal the work done in the components
Question 3
Question
Why is the potential difference largest across the component with the most resistance?
Answer
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more work is done by the charge moving through a large resistance than a smaller one
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it takes more energy to move across a bigger resistance
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