Required practical - Investigating resistance (AQA GCSE Physics): Flashcards
📚Flashcards
Practise the cards
13 cards from this deck
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Practise the cards
13 cards from this deck
Ohm's Law formula
Ohm's Law formula
Ammeter measures
Ammeter measures
Current
Voltmeter measures
Voltmeter measures
Potential difference
How voltage behaves in series circuits
How voltage behaves in series circuits
Splits across the resistors
Voltage in parallel circuits
Voltage in parallel circuits
Same for each resistor (equals power supply voltage)
Total resistance formula for series
Total resistance formula for series
Series vs parallel: which has higher total resistance?
Series vs parallel: which has higher total resistance?
Series circuits
Total resistance in parallel vs smallest resistor
Total resistance in parallel vs smallest resistor
Lower than the smallest individual resistor
Effect of longer wire on resistance
Effect of longer wire on resistance
Higher resistance
Relationship between wire length & resistance
Relationship between wire length & resistance
Directly proportional
Graph shape: resistance vs wire length
Graph shape: resistance vs wire length
Straight line through the origin
Why keep circuit off between measurements?
Why keep circuit off between measurements?
Prevent wire heating up (affects resistance)
Why take repeat readings?
Why take repeat readings?
Makes results more reliable