PN Junction Behavior Quiz
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Questions and Answers

What happens to the flow of holes towards the p-side as more holes accumulate on the p-side?

  • The flow of holes towards the p-side becomes easier
  • The flow of holes towards the p-side remains unchanged
  • The flow of holes towards the p-side becomes random and chaotic
  • The flow of holes towards the p-side becomes harder due to repulsion (correct)
  • What happens to the flow of electrons towards the n-side as more electrons accumulate on the n-side?

  • The flow of electrons towards the n-side becomes harder due to repulsion (correct)
  • The flow of electrons towards the n-side becomes easier
  • The flow of electrons towards the n-side becomes random and chaotic
  • The flow of electrons towards the n-side remains unchanged
  • What is the maximum voltage that can be generated in a p-n junction solar cell?

  • The forward bias voltage
  • The reverse bias voltage
  • The open-circuit voltage (Voc) (correct)
  • The short-circuit current (Isc)
  • What happens to the current flow in a short-circuited p-n junction solar cell?

    <p>The current flow is at its maximum (Isc)</p> Signup and view all the answers

    Which of the following materials is typically used to form a p-n junction in a solar cell?

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

    What is the direction of current flow in a short-circuited p-n junction solar cell?

    <p>From n-side to p-side</p> Signup and view all the answers

    What is the short-circuit current of a solar cell?

    <p>The photocurrent Ip</p> Signup and view all the answers

    What defines the power conversion efficiency of a solar cell?

    <p>The ratio of output electrical power to incident optical power</p> Signup and view all the answers

    What happens at the short-circuit condition of a solar cell?

    <p>Current is zero</p> Signup and view all the answers

    What is the role of load resistance in a p-n junction solar cell?

    <p>It produces a potential difference for current flow</p> Signup and view all the answers

    What does forward bias voltage in a p-n junction solar cell result in?

    <p>Forward current</p> Signup and view all the answers

    What is the V-I characteristic of a solar cell at open-circuit condition?

    <p>Zero potential difference and no accumulated charges</p> Signup and view all the answers

    What is the short-circuit current ($I_{sc}$) in terms of the photogenerated current ($I_p$)?

    <p>$I_{sc} = -I_p$</p> Signup and view all the answers

    What is the open-circuit voltage ($V_{oc}$) in terms of the reverse saturation current ($I_0$) and the photogenerated current ($I_p$)?

    <p>$V_{oc} = \frac{k_BT}{e}\ln\left(1+\frac{I_p}{I_0}\right)$</p> Signup and view all the answers

    What condition must be satisfied to find the voltage ($V_m$) that produces the maximum power output from the solar cell?

    <p>$\frac{dP}{dV} = 0$ at $V = V_m$</p> Signup and view all the answers

    What is the relationship between the voltage ($V_m$) that produces the maximum power output and the open-circuit voltage ($V_{oc}$)?

    <p>$V_m = V_{oc} - \frac{k_BT}{e}\ln\left(1+\frac{I_p}{I_0}\right)$</p> Signup and view all the answers

    What is the maximum power ($P_m$) delivered to the load in terms of the voltage ($V_m$) and the current ($I_m$) at the maximum power point?

    <p>$P_m = V_mI_m$</p> Signup and view all the answers

    What is the purpose of the p-n junction in a solar cell?

    <p>To provide a barrier that separates the electron-hole pairs generated by light</p> Signup and view all the answers

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