Required practical - Investigating I-V characteristics (AQA GCSE Physics): Flashcards
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Practise the cards
15 cards from this deck
What I-V characteristics show
What I-V characteristics show
How current changes when potential difference changes
Three components tested in I-V practical
Three components tested in I-V practical
Resistor, filament lamp, diode
Equipment that measures current
Equipment that measures current
Ammeter
Equipment that measures potential difference
Equipment that measures potential difference
Voltmeter
Purpose of variable resistor in I-V practical
Purpose of variable resistor in I-V practical
Changes the voltage in the circuit
Axis for current () on I-V graph
Axis for current () on I-V graph
y-axis
I-V graph shape for resistor (constant temp)
I-V graph shape for resistor (constant temp)
Straight line through origin
I-V graph shape for filament lamp
I-V graph shape for filament lamp
Curved S-shape
I-V graph characteristic for diode
I-V graph characteristic for diode
Current only flows in one direction
Why reverse battery in I-V practical
Why reverse battery in I-V practical
To get negative values for and
Main safety concern in I-V practical
Main safety concern in I-V practical
Electric current produces heat and can cause burns
How to improve accuracy in I-V practical
How to improve accuracy in I-V practical
Take repeat readings
Why resistor gives straight line I-V graph
Why resistor gives straight line I-V graph
Follows Ohm's law at constant temperature
Why filament lamp I-V graph is curved
Why filament lamp I-V graph is curved
Gets hotter as current increases, changing resistance
Direction diode allows current to flow
Direction diode allows current to flow
One direction only