Power Ratings (AQA GCSE Physics Combined Science): Flashcards
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Practise the cards
12 cards from this deck
Power rating definition
Power rating definition
Max power an appliance can safely operate at
What power rating indicates
What power rating indicates
Max energy transferred per second
Does higher power rating mean more useful energy?
Does higher power rating mean more useful energy?
No, not necessarily
Does high power rating mean high efficiency?
Does high power rating mean high efficiency?
No, high power doesn't mean high efficiency
Equation for energy from charge & p.d.
Equation for energy from charge & p.d.
Units in
Units in
in J, in C, in V
What flows through circuit to transfer energy?
What flows through circuit to transfer energy?
Charge carriers
Power equation using p.d. & current
Power equation using p.d. & current
Units in
Units in
in W, in V, in A
Power equation using current & resistance
Power equation using current & resistance
Units in
Units in
in W, in A, in Ω
When to use instead of
When to use instead of
When potential difference is not known