Potential difference & resistance (Edexcel GCSE Physics): Flashcards
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Potential difference definition
Potential difference definition
Driving force causing electric charges to flow
Unit of potential difference
Unit of potential difference
Volts (V)
Tool to measure potential difference
Tool to measure potential difference
Voltmeter
How to connect voltmeter
How to connect voltmeter
In parallel with the component
Resistance definition
Resistance definition
Slows down the flow of electrical charges
Unit of resistance
Unit of resistance
Ohms ()
Equation relating V, I, and R
Equation relating V, I, and R
Formula to calculate current from V and R
Formula to calculate current from V and R
Effect of electrons colliding with ions
Effect of electrons colliding with ions
Ions vibrate and heat up
Effect of heating on electron flow in resistor
Effect of heating on electron flow in resistor
Harder for electrons to pass through
Thermistor resistance when warming up
Thermistor resistance when warming up
Decreases
What happens if resistor gets too hot
What happens if resistor gets too hot
Current stops
