23.1 – Investigating Current and Voltage in a Filament Lamp (Leaving Cert Physics): Flashcards
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Type of conductor a filament lamp is
Type of conductor a filament lamp is
Non-ohmic conductor
I-V graph shape for a filament lamp
I-V graph shape for a filament lamp
Curved line
I-V graph shape for an ohmic conductor
I-V graph shape for an ohmic conductor
Straight line
Why a filament lamp is non-ohmic
Why a filament lamp is non-ohmic
Its resistance changes with temperature
Effect on filament when voltage increases
Effect on filament when voltage increases
Heats up and resistance increases
How to connect an ammeter in the circuit
How to connect an ammeter in the circuit
In series with the bulb
How to connect a voltmeter in the circuit
How to connect a voltmeter in the circuit
In parallel with the bulb
Purpose of variable resistor/rheostat
Purpose of variable resistor/rheostat
Control voltage and current in circuit
I-V curve slope at low voltages
I-V curve slope at low voltages
Steep
I-V curve slope at high voltages
I-V curve slope at high voltages
Flattens/gradual
Why I-V curve is steep at low voltage
Why I-V curve is steep at low voltage
Filament cool, low resistance
Why I-V curve flattens at high voltage
Why I-V curve flattens at high voltage
Filament hot, high resistance
Max temperature tungsten filament can reach
Max temperature tungsten filament can reach
Over 2000°C
Axes for I-V graph (current and voltage)
Axes for I-V graph (current and voltage)
on y-axis, on x-axis
