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Pn Diode Free Doubts and Solutions

CBSE - XII Science - Physics - Semiconductor Electronics

though n type conductor has large number of electrons then why it is electrically neutral?

Asked by vasturushi 14th November 2017, 9:30 PM
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CBSE - XII Science - Physics - Semiconductor Electronics

1. Can u explain how barrier potential is opposite to the applied voltage in forward bias an why applied voltage decreases in depletion region.

Asked by Prakash 19th October 2017, 8:33 PM
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CBSE - XII Science - Physics - Semiconductor Electronics

What exactly is an electron hole pair? Why is it a pair?

Asked by Anirudh 18th August 2017, 3:37 PM
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CBSE - XII Science - Physics - Semiconductor Electronics

why is the direction of electric field marked as positive to negative in the depletion region?

Asked by Anirudh 16th August 2017, 10:40 AM
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CBSE - XII Science - Physics - Semiconductor Electronics

Can you explain the concept of barrier potential using a diagram showing the direction of electric field in the case of forward and reverse bias?

Asked by Anirudh 16th August 2017, 7:32 AM
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CBSE - XII Science - Physics - Semiconductor Electronics

Why can't we physically join p-type and n-type semiconductors directly to form a p-n junction? Why the depletion layer widens on doing so?

Asked by Aswin 14th January 2016, 5:21 PM
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CBSE - XII Science - Physics - Semiconductor Electronics

A photodiode is fabricated from a semiconductor with band gap of 2.8 eV. Cn it detect a wavelength of 6000 nm ? Justify

Asked by vinitapahel123 1st December 2015, 3:54 PM
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CBSE - XII Science - Physics - Semiconductor Electronics

What is the direction of the diffusion current in the PN Junction ( n-type to p-type or p-type to n-type )?
Please explain the reason also.

Asked by damarlasumanjali 23rd July 2015, 10:16 AM
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CBSE - XII Science - Physics - Semiconductor Electronics

(a) Explain with the help of a diagram, how depletion region and potential barrier are formed in a junction diode. (b) If a small voltage is applied to a p-n junction diode, how will the barrier potential be affected when it is (i) forward biased, and (ii) reveres biased? 

Asked by Topperlearning User 10th July 2015, 7:47 AM
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CBSE - XII Science - Physics - Semiconductor Electronics

What happens when a forward bias is applied to a p-n junction?

Asked by Topperlearning User 8th July 2015, 11:39 AM
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CBSE - XII Science - Physics - Semiconductor Electronics

Explain how a depletion region is formed in p-n junction diode

Asked by Tanya 14th January 2015, 11:50 AM
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CBSE - XII Science - Physics - Semiconductor Electronics

If the forward voltage in a semiconductor diode is changed from 1 to 2.5 V, then the forward current changes by 1.5 mA. What is the resistance of junction diode? 

Asked by Topperlearning User 19th June 2014, 11:08 AM
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CBSE - XII Science - Physics - Semiconductor Electronics

Give the barrier potential of : silicon germanium

Asked by Topperlearning User 19th June 2014, 10:51 AM
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CBSE - XII Science - Physics - Semiconductor Electronics

How does an ideal diode behave when forward biased and reverse biased?

Asked by Topperlearning User 18th June 2014, 11:21 AM
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CBSE - XII Science - Physics - Semiconductor Electronics

What do you understand by breakdown and breakdown voltage?

Asked by Topperlearning User 18th June 2014, 11:15 AM
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CBSE - XII Science - Physics - Semiconductor Electronics

a) In the depletion region of an unbiased p-n junction diode, what are the charge carriers? b)Which biasing makes the junction resistance low and which high?

Asked by Topperlearning User 18th June 2014, 11:05 AM
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CBSE - XII Science - Physics - Semiconductor Electronics

Name the different types of currents flowing through a p-n junction diode.

Asked by Topperlearning User 18th June 2014, 10:52 AM
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CBSE - XII Science - Physics - Semiconductor Electronics

Can we measure the potential difference of a p-n junction by putting a sensitive voltmeter across its terminals?

Asked by Topperlearning User 18th June 2014, 10:48 AM
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CBSE - XII Science - Physics - Semiconductor Electronics

What do you mean by depletion layer and potential barrier for a p-n junction.

Asked by Topperlearning User 18th June 2014, 10:42 AM
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CBSE - XII Science - Physics - Semiconductor Electronics

What is an intrinsic semiconductor? How can this material be converted into (i) P- type (ii) N- type extrinsic semiconductor? Explain with the help of energy band diagrams.

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

How does the width of the depletion region of a p-n junction vary, if the reverse bias applied to it decrease ?

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

What all techniques need to be used to obtained p-n junction?

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