Welcome to the Quiz!
This quiz contains 12 questions from a mix of 1 subtopics.
What equipment is used to measure current in a circuit when obtaining an I-V characteristic?
voltmeter
ammeter
power meter
resistance meter
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What feature of an I-V graph indicates non-ohmic behavior?
A vertical line
A horizontal line
A curved line
A diagonal line
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Which of the following components would have a non-linear I-V characteristic?
LED
resistor
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What happens to the gradient of the I-V graph for a filament lamp as the current increases?
gradient decreases
gradient increases
gradient becomes vertical
gradient stays the same
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Which effect causes the resistance of a hot filament to increase?
larger cross sectional area
fewer free electrons
higher electron drift velocity
more collisions between electrons
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What happens inside metals as temperature increases?
ion vibrations decrease
electron flow increases
ion collisions increase
resistance decreases
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In what orientation would an LED have a higher resistance?
forward bias
reverse bias
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What shape would the I-V characteristic of a fixed value resistor take?
curved line
horizontal line
vertical line
straight line
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What happens to the gradient of a diode I-V graph in forward bias after the threshold voltage?
gradient decreases rapidly
gradient increases rapidly
gradient levels off
gradient becomes vertical
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Heating a filament lamp filament causes the resistivity to _____.
oscillate
remain constant
increase
decrease
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In forward bias, once the threshold voltage is exceeded in a diode, the _____.
current increases rapidly
voltage increases rapidly
voltage remains low
current remains low
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Give two reasons why the resistivity of a hot filament increases.
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