Energy in circuits (Edexcel GCSE Physics Combined Science): Flashcards
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13 cards from this deck
Factors affecting energy transfer in circuits
Factors affecting energy transfer in circuits
Current (), potential difference (), and time ()
Formula for energy transferred in a circuit
Formula for energy transferred in a circuit
Unit of energy (symbol)
Unit of energy (symbol)
Joules (J)
Unit of potential difference (symbol)
Unit of potential difference (symbol)
Volts (V)
Unit of current (symbol)
Unit of current (symbol)
Amperes (A)
Effect of larger current on energy transferred
Effect of larger current on energy transferred
More energy is transferred
Effect of larger p.d. on energy transferred
Effect of larger p.d. on energy transferred
More energy is transferred
Two forms of energy a light bulb transfers to
Two forms of energy a light bulb transfers to
Light and thermal energy
What resistance in a circuit generates
What resistance in a circuit generates
Heat
Effect of higher current on heat in components
Effect of higher current on heat in components
More energy transferred to heat
Effect of heating a circuit on resistance
Effect of heating a circuit on resistance
Increases resistance
Why heating reduces circuit efficiency
Why heating reduces circuit efficiency
Less energy to useful stores, more to thermal energy
How fuses protect circuits
How fuses protect circuits
Melt and break circuit if current gets too high