Required practical - Investigating I-V characteristics (AQA GCSE Physics): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
ShowHide
Practise the questions
12 questions from this quiz
What do I-V characteristics show?
What do I-V characteristics show?
How current changes with potential difference
On an I-V graph, which axis shows current?
On an I-V graph, which axis shows current?
y-axis
What does an ammeter measure in this practical?
What does an ammeter measure in this practical?
Current
What is the function of the variable resistor?
What is the function of the variable resistor?
Changes the voltage in the circuit
How should you start the practical in terms of voltage?
How should you start the practical in terms of voltage?
Start with the lowest possible voltage
Why is safety important when working with electrical circuits?
Why is safety important when working with electrical circuits?
Electric current produces heat and can burn
What shape is the I-V graph for a resistor at constant temperature?
What shape is the I-V graph for a resistor at constant temperature?
Straight line through origin
What shape is the I-V graph for a filament lamp?
What shape is the I-V graph for a filament lamp?
Curved S-shape
In which direction does a diode allow current to flow?
In which direction does a diode allow current to flow?
In one direction only
How many readings should you take for each component?
How many readings should you take for each component?
At least 6-8 readings
How can you improve the accuracy of your results?
How can you improve the accuracy of your results?
Take repeat readings
Why does the resistance of a filament lamp change?
Why does the resistance of a filament lamp change?
It gets hotter as current increases