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Phototransistors
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Phototransistors

Created by
@DextrousThunderstorm

Questions and Answers

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?

  • 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?

  • 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?

    <p>Increases</p> Signup and view all the answers

    What is the role of the phototransistor's base when the transistor is switched off?

    <p>Small collector can emit leakage current</p> Signup and view all the answers

    What is the function of the base in a phototransistor?

    <p>It is responsible for producing and controlling the base current by light</p> Signup and view all the answers

    What is the equation for the collector current in a phototransistor?

    <p>$I_c=(1+\beta)I_{co}$</p> Signup and view all the answers

    What happens to the collector current as light intensity increases?

    <p>It increases</p> Signup and view all the answers

    What controls the current flow between the emitter and collector in a phototransistor?

    <p>The base</p> Signup and view all the answers

    What is the role of the phototransistor's base when the transistor is switched off?

    <p>It can emit leakage current</p> Signup and view all the answers

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