ac and dc (AQA GCSE Physics Combined Science): Flashcards
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13 cards from this deck
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Practise the cards
13 cards from this deck
Electric current
Electric current
Flow of electrons through a wire
Direct current (dc)
Direct current (dc)
Electrons flow in one direction only
Alternating current (ac)
Alternating current (ac)
Electrons keep changing direction back and forth
Three sources of dc
Three sources of dc
Batteries, cells, solar panels
UK mains electricity voltage
UK mains electricity voltage
UK mains electricity frequency
UK mains electricity frequency
Direction changes per second at
Direction changes per second at
100 changes per second
DC appearance on oscilloscope
DC appearance on oscilloscope
Straight horizontal line
AC appearance on oscilloscope
AC appearance on oscilloscope
Wavy line (sine wave)
Two DC devices used in homes
Two DC devices used in homes
Mobile phones, laptops
Two AC devices used in homes
Two AC devices used in homes
Kettles, washing machines
What a power rating tells you
What a power rating tells you
How much energy the device uses each second
Effect of higher power rating
Effect of higher power rating
More energy used per second, costs more to run