53730
Descripción
Test por hannah.pickard, actualizado hace más de 1 año
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Creado por hannah.pickard
hace más de 11 años
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Pregunta 1
Pregunta
Why do resistors get hotter when there is an electric current through them?
Respuesta
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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
Pregunta 2
Pregunta
Why does the potential difference across two or more components add up to the potential difference across the battery?
Respuesta
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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
Pregunta 3
Pregunta
Why is the potential difference largest across the component with the most resistance?
Respuesta
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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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