Energy in circuits (Edexcel GCSE Physics): Flashcards
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Practise the cards
12 cards from this deck
Formula for energy transferred in a circuit
Formula for energy transferred in a circuit
Unit of energy transferred ()
Unit of energy transferred ()
Joules (J)
Three factors affecting energy transferred in circuits
Three factors affecting energy transferred in circuits
Current (), potential difference (), and time ()
What happens when charge experiences change in potential difference
What happens when charge experiences change in potential difference
Energy is transferred
Effect of larger current or potential difference on energy transferred
Effect of larger current or potential difference on energy transferred
More energy is transferred
Energy stores transferred to in a light bulb
Energy stores transferred to in a light bulb
Light and thermal energy
What energy store is always heated when current flows
What energy store is always heated when current flows
Thermal energy stores of components
Effect of higher current on component temperature
Effect of higher current on component temperature
More energy transferred to heat, increasing temperature
Effect of heating a circuit on resistance
Effect of heating a circuit on resistance
Usually increases resistance
Why heating reduces efficiency in circuits
Why heating reduces efficiency in circuits
Less energy to useful stores, more to thermal energy
Risk if component heats up too much
Risk if component heats up too much
Can melt or become damaged
How fuses protect circuits
How fuses protect circuits
Melt and break circuit if current gets too high