Required Practical: Investigating I–V Characteristics (OCR GCSE Physics A (Gateway Science Suite)): Flashcards
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15 cards from this deck
Formula for resistance
Formula for resistance
in resistance formula
in resistance formula
Resistance (Ω)
in resistance formula
in resistance formula
Potential difference (V)
in resistance formula
in resistance formula
Current (A)
Resistance vs. wire length relationship
Resistance vs. wire length relationship
Directly proportional
Zero error definition
Zero error definition
Systematic error: reading on instrument when value should be zero
Correcting zero error in resistance
Correcting zero error in resistance
Subtract zero error from all readings
Temperature effect on wire resistance
Temperature effect on wire resistance
Resistance increases
Reducing heating in wire
Reducing heating in wire
Use low P.D. to keep current low
When to turn on current
When to turn on current
Only when taking reading; off between readings
I-V characteristic curve shows
I-V characteristic curve shows
Relationship between current and voltage
I-V graph shape for resistor
I-V graph shape for resistor
Straight line (linear)
Straight-line I-V graph indicates
Straight-line I-V graph indicates
Ohm's law is obeyed
Diode current flow direction
Diode current flow direction
One direction only
Filament bulb resistance vs. temperature
Filament bulb resistance vs. temperature
Resistance increases as temperature rises