Required practical - Investigating I-V characteristics (AQA GCSE Physics Combined Science): Quizzes
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Practise the questions
14 questions from this quiz
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Practise the questions
14 questions from this quiz
What does an I-V characteristic graph show?
What does an I-V characteristic graph show?
How current changes with voltage
Which three components are investigated in this practical?
Which three components are investigated in this practical?
Resistor, filament lamp, and diode
What does an ammeter measure in this experiment?
What does an ammeter measure in this experiment?
Current
How must the voltmeter be connected in the circuit?
How must the voltmeter be connected in the circuit?
In parallel across the component
How must the ammeter be connected in the circuit?
How must the ammeter be connected in the circuit?
In series with the component
What is the purpose of the variable resistor?
What is the purpose of the variable resistor?
To change the voltage across the component
Why should you reverse the battery connections during the experiment?
Why should you reverse the battery connections during the experiment?
To get negative values for a complete picture
On an I-V graph, which axis should current be plotted on?
On an I-V graph, which axis should current be plotted on?
The y-axis (vertical)
What shape is the I-V graph for a resistor?
What shape is the I-V graph for a resistor?
Straight line through the origin
What shape is the I-V graph for a filament lamp?
What shape is the I-V graph for a filament lamp?
Curved line
What is the key characteristic of a diode shown on its I-V graph?
What is the key characteristic of a diode shown on its I-V graph?
Current only flows in one direction
Why must you include a switch in the circuit?
Why must you include a switch in the circuit?
To control current flow and prevent danger
Why should you avoid letting the current get too large?
Why should you avoid letting the current get too large?
It causes heating that changes resistance
What does 'accurate data' mean?
What does 'accurate data' mean?
Close to the true value