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प्रश्न
State the principle of solar cells.
उत्तर
A solar cell is an unbiased pn-junction that converts sunlight energy directly into electricity with high efficiency.
Principle: A solar cell operates on the photovoltaic effect, which produces an emf as a result of irradiation between the two layers of a pn-junction.
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संबंधित प्रश्न
Choose the correct option:
A Series resistance is connected in the Zener diode circuit to ______.
An LED emits visible light when it's ______.
Answer in brief.
On which factors does the wavelength of light emitted by a LED depend?
Answer in brief.
Why should a photodiode be operated in reverse biased mode?
Answer in brief.
State the uses of the solar cell.
Explain how a Zener diode maintains a constant voltage across a load.
Explain the working of a LED.
Explain the principle of operation of a photodiode.
State any two advantages and disadvantages of a photodiode.
Define the dark current of the photodiode. What are the advantages and disadvantages of a photodiode?
What will be the current flowing through the 6 kΩ resistor in the circuit shown, where the breakdown voltage of the Zener is 6V?
With a neat labelled diagram, explain the working of a photodiode. Calculate the wavelength in angstrom at which the emissive power is maximum for a blackbody heated to 3727 °C.
State the factors which control the wavelength of light emitte d by an LED.
Zener breakdown results from breaking of Si-Si covalent bonds in a silicon junction diode due to ______.
Give the name of the following symbol.
Draw a neat labelled schematic diagram of LED.
Distinguish between light-emitting diode and photo-diode.
What is Avalanche breakdown?
What is a Light Emitting Diode?
Draw Light Emitting Diode circuit symbol.
