Required Practical: Investigating I–V Characteristics (AQA GCSE Physics Combined Science): Flashcards
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Formula for resistance
Formula for resistance
in resistance formula (with unit)
in resistance formula (with unit)
Resistance (Ω)
in resistance formula (with unit)
in resistance formula (with unit)
Potential difference (V)
in resistance formula (with unit)
in resistance formula (with unit)
Current (A)
Relationship between resistance and wire length
Relationship between resistance and wire length
Directly proportional
Zero error definition
Zero error definition
Systematic error; reading when value should be zero
How to handle zero error in resistance readings
How to handle zero error in resistance readings
Subtract the zero error from all readings
Effect of increased temperature on wire resistance
Effect of increased temperature on wire resistance
Resistance increases
Why use low P.D. in the wire experiment
Why use low P.D. in the wire experiment
Keep current low, reducing heating in wire
What I-V characteristic curve shows
What I-V characteristic curve shows
Relationship between current and voltage across component
I-V characteristic of a resistor
I-V characteristic of a resistor
Straight line (linear); obeys Ohm's law
I-V characteristic of a diode
I-V characteristic of a diode
Curve; only allows current in one direction
I-V characteristic of a filament bulb
I-V characteristic of a filament bulb
Curve; resistance increases as temperature rises
Expected graph for a resistor in I-V practical
Expected graph for a resistor in I-V practical
Straight-line graph
Safety: when to switch off circuit
Safety: when to switch off circuit
Before making any changes