Power Ratings (AQA GCSE Physics): Flashcards
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Practise the cards
13 cards from this deck
Power rating
Power rating
Max power an appliance can safely operate at
What power rating indicates
What power rating indicates
Max energy transferred per second by appliance
Higher power rating → more useful energy?
Higher power rating → more useful energy?
No, doesn't mean more useful energy transferred
High power rating & efficiency
High power rating & efficiency
May be less efficient than low power appliance
Energy from charge & p.d. formula
Energy from charge & p.d. formula
unit in
unit in
joules (J)
unit in
unit in
coulombs (C)
unit in
unit in
volts (V)
Power from p.d. & current formula
Power from p.d. & current formula
unit in
unit in
watts (W)
unit in
unit in
amps (A)
Power from current & resistance formula
Power from current & resistance formula
unit in
unit in
ohms (Ω)