Photodiode (AQA A-Level Physics): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What is the primary function of a photodiode?
What is the primary function of a photodiode?
Detecting light and converting to signal
What type of junction is used to construct a photodiode?
What type of junction is used to construct a photodiode?
p-type and n-type materials
How does current relate to light intensity in a photodiode?
How does current relate to light intensity in a photodiode?
Directly proportional
In photoconductive mode, which terminal is the p-type side connected to?
In photoconductive mode, which terminal is the p-type side connected to?
Positive terminal
What happens to response time as reverse bias increases in photoconductive mode?
What happens to response time as reverse bias increases in photoconductive mode?
Decreases
What is the typical dark current in photovoltaic mode when no light is present?
What is the typical dark current in photovoltaic mode when no light is present?
About 500 pA
What is the formula for responsivity of a photodiode?
What is the formula for responsivity of a photodiode?
What wavelength ranges can photodiodes be manufactured to respond to?
What wavelength ranges can photodiodes be manufactured to respond to?
UV, visible, or infrared
How do photodiodes detect smoke in smoke detectors?
How do photodiodes detect smoke in smoke detectors?
Smoke scatters infrared light into it
How is efficiency maximised when coupling photodiodes with scintillators?
How is efficiency maximised when coupling photodiodes with scintillators?
Match spectral response to scintillator