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Questions and Answers
What is the equation for the collector current in a phototransistor?
What is the equation for the collector current in a phototransistor?
- $I_c = \frac{I_{co}}{1+\beta}$
- $I_c = (1+\beta)I_{co}$ (correct)
- $I_c = I_{co} - \beta$
- $I_c = I_{co} + \beta$
What controls the current flow between the emitter and collector in a phototransistor?
What controls the current flow between the emitter and collector in a phototransistor?
- Light sensitive collector-base p-n junction (correct)
- Emitter current
- Emitter-collector voltage
- Base current
What is the function of the base in a phototransistor?
What is the function of the base in a phototransistor?
- Produce and control base current by light
- Generate voltage for the circuit
- Amplify the collector current
- Control the larger emitter-collector current (correct)
What happens to the collector current as light intensity increases?
What happens to the collector current as light intensity increases?
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What is the role of the phototransistor's base when the transistor is switched off?
What is the role of the phototransistor's base when the transistor is switched off?
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What is the function of the base in a phototransistor?
What is the function of the base in a phototransistor?
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What is the equation for the collector current in a phototransistor?
What is the equation for the collector current in a phototransistor?
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What happens to the collector current as light intensity increases?
What happens to the collector current as light intensity increases?
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What controls the current flow between the emitter and collector in a phototransistor?
What controls the current flow between the emitter and collector in a phototransistor?
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What is the role of the phototransistor's base when the transistor is switched off?
What is the role of the phototransistor's base when the transistor is switched off?
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