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Applications Of Pn Diode Free Doubts and Solutions

CBSE - XII Science - Physics - Semiconductor Electronics

Q- we find a large current of order m milliampere in forward bias and a small current of order microampere in Reverse bias condition so why we connect photodiode in Reverse bias

Asked by modi72879 16th December 2017, 10:43 AM
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CBSE - XII Science - Physics - Semiconductor Electronics

What will be the direction of flow of majority charge carriers in reverse biased p-n junction?

Asked by Satish 6th December 2017, 7:14 AM
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CBSE - XII Science - Physics - Semiconductor Electronics

Explain half wave and full wave rectifier.

Asked by pksunilnair 4th December 2017, 9:15 AM
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CBSE - XII Science - Physics - Semiconductor Electronics

1. What is the direction of photocurrent genereated in photodiode?

Asked by Prakash 3rd November 2017, 11:47 AM
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CBSE - XII Science - Physics - Semiconductor Electronics

Please explain the reasoning for I-V characteristics of solar cell. how is it possible that the voltage is zero and there is corresponding short circuit current ?

Asked by Anirudh 19th August 2017, 6:57 AM
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CBSE - XII Science - Physics - Semiconductor Electronics

In case of solar cells why is the p side (300 micro meters) so much more thicker than the n side (0.3 micro meter)? Also why an emf is generated in the case of solar cell. 

Asked by Anirudh 19th August 2017, 6:40 AM
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CBSE - XII Science - Physics - Semiconductor Electronics

What is the direction of drift current and diffusion current? What is the reasoning behind it? Is the direction of current is the direction of flow of electrons or holes?

Asked by Anirudh 14th August 2017, 12:20 PM
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CBSE - XII Science - Physics - Semiconductor Electronics

in a semiconductor diode,P -side is earthed and N-side is put at potential of -2v(minus two),the diode shall
 
 
dear sir/maam
            its will conduct or not ?

Asked by Sharaj 10th April 2017, 4:23 PM
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CBSE - XII Science - Physics - Semiconductor Electronics

How is a Zener diode fabricated? What causes the setting up of high electric field even for small reverse bias voltage across the diode? Describe, with the help of a circuit diagram, the working of Zener diode as a voltage regulator.

Asked by Topperlearning User 10th July 2015, 7:40 AM
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CBSE - XII Science - Physics - Semiconductor Electronics

semiconductor diode -i-v charactersticcs in forrward and reverse bias???

Asked by ARUN S 4th March 2015, 4:32 PM
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CBSE - XII Science - Physics - Semiconductor Electronics

Why photo diode act in reverse biase only?

Asked by Tanya 14th January 2015, 11:53 AM
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CBSE - XII Science - Physics - Semiconductor Electronics

Asked by Kim 28th November 2014, 6:50 PM
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CBSE - XII Science - Physics - Semiconductor Electronics

Why the centre tap of a centre tapped transformer grounded?

Asked by MANISHA MOHANTY 29th October 2014, 12:32 AM
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CBSE - XII Science - Physics - Semiconductor Electronics

The current in the forward bias is know to be more (tildemA) than the current in the reverse bias (tildeμA). What is the reason, then, to operate the photodiode in reverse bias?

Asked by Topperlearning User 10th July 2014, 10:05 AM
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CBSE - XII Science - Physics - Semiconductor Electronics

Draw the circuit diagram of an illuminated photodiode in reverse bias. How is photodiode used to measure light intensity?

Asked by Topperlearning User 19th June 2014, 3:39 PM
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CBSE - XII Science - Physics - Semiconductor Electronics

Distinguish between photo current and dark current.

Asked by Topperlearning User 19th June 2014, 2:11 PM
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CBSE - XII Science - Physics - Semiconductor Electronics

Name two materials used in constructing solar cell.Give 2 uses of  solar cell?

Asked by Topperlearning User 19th June 2014, 2:06 PM
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CBSE - XII Science - Physics - Semiconductor Electronics

What is a zener diode? why is it also known as breakdown diode.Name one application of Zener diode.

Asked by Topperlearning User 19th June 2014, 1:54 PM
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CBSE - XII Science - Physics - Semiconductor Electronics

The figure below shows the V-I characteristic of a semiconductor diode. (i) Identify the semiconductor diode used. (ii) Draw the circuit diagram to obtain the given characteristic of this device. (iii) Briefly explain how this diode can be used as a voltage regulator.

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - XII Science - Physics - Semiconductor Electronics

Explain, with the help of a schematic diagram, the principle and working of a Light Emitting Diode. What criterion is kept in mind while choosing the semiconductor material for such a device? Write any two advantages of Light Emitting Diode over conventional indcandescent lamps.

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - XII Science - Physics - Semiconductor Electronics

Name the semiconductor device that can be used to regulate an unregulated de power supply. With the help of I-V characteristics of this device, explain its working principle.

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - XII Science - Physics - Semiconductor Electronics

Draw the I-V characteristics of a solar cell.

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - XII Science - Physics - Semiconductor Electronics

Differentiate between Half-wave rectifier and full- wave rectifier

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - XII Science - Physics - Semiconductor Electronics

Draw the circuit diagram for a full-wave rectifier using a p-n junction diodes. Draw input and output waveforms too.

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - XII Science - Physics - Semiconductor Electronics

Name the p-n junction diode which emits spontaneous radiations when forward biased. How do we choose the semiconductor, to be used in these diodes, if the emitted radiation is to be in the visible region?

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - XII Science - Physics - Semiconductor Electronics

Show the biasing of a photodiode with the help of a circuit diagram. Draw graphs to show variations in reverse bias currents for different illumination intensities.

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - XII Science - Physics - Semiconductor Electronics

The output of an unregulated d.c power is to be regulated. Name the device that can be used for this purpose and draw the relevant circuit diagram.

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - XII Science - Physics - Semiconductor Electronics

What is the most common use of photodiode?

Asked by Topperlearning User 4th June 2014, 1:23 PM
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