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प्रश्न
Briefly explain how emf is generated in a solar cell.
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उत्तर
Process of emf generation in a solar cell:
- Light falls on the junction. Electron-hole pairs are generated.
- The electron and hole move in opposite directions due to the junction field. Electrons move towards the n-side and holes move towards the p-side of the junction.
- The two sides of the junction become oppositely charged and a photovoltage is generated.
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संबंधित प्रश्न
Using the necessary circuit diagrams, show how the V-I characteristics of a p-n junction are obtained in
Reverse biasing
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Explain the formation of depletion layer and potential barrier in a p−n junction.
Write the important considerations which are to be taken into account while fabricating a p-n junction diode to be used as a Light Emitting Diode (LED). What should be the order of the band gap of an LED, if it is required to emit light in the visible range? Draw a circuit diagram and explain its action.
Pressure P varies as P = `alpha/beta "exp" (- (alpha x)/"k"_"BT")`, where x denotes the distance, kB is the Boltzmann's constant, T is the absolute temperature and α and β are constant. The dimension of β is ______.
Consider the following statements (A) and (B) and identify the correct answer.
- A Zener diode is connected in reverse bias when used as a voltage regulator.
- The potential barrier of the p-n junction lies between 0.1 V to 0.3 V.
In Figure, assuming the diodes to be ideal ______.

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