Physics I-V Characteristics Flashcards
What is the aim?
To use circuit diagrams to construct appropriate circuits to investigate the I-V characteristics of a variety of circuit elements, including a filament lamp, a diode and a resistor at a constant temp
What does this practical explore?
How the resistance of resistors, diodes and filament lamps vary as the applied voltage is varied
Independent variable
Voltage across the circuit component bring measured
Dependent variable
Current flowing through the circuit component being measured
Control variables
Temperature of the circuit
Which instrument is used to measure the current in the circuit?
Ammeter
What is the purpose of the variable resistor in the circuit
To vary the voltage across the filament lamp
Which of the component would result in a I-V graph which is a straight line through the origin
Resistor
Which component allows the current to flow in the positive direction but not in the negative direction
Diode
Why is it important to turn the power supply off between readings?
To prevent the temperature of the circuit from increasing
