Plus Two Physics

SEMICONDUCTOR DEVICES–CLASS 12 PHYSICS QUESTION BANK

1. Draw a circuit diagram of OR gate.

2. What is a logic gate?

3. What types of charge-carriers are there in a n-type semi conductor?

4. Give the logical symbol of an AND gate. Mark the inputs and outputs.

5. Draw the logic symbol for a NAND gate.

6. Which biasing will make the resistance of p-n junction high?

7. Write the truth table for OR gate.

8. What is the change in the collector current, in a transistor of a.c. current gain 150, for a 100µA change in its base current?

9. When the voltage drop across a p-n junction diode is increased from 0.65V to 0.70V, the change in the diode current is 5mA. What is the dynamic resistance of the diode?

10. How does conductivity of a semiconductor change with rise in its temperature? Read more…

2 comments - What do you think? Posted by admin - December 2, 2011 at 7:48 am

Categories: +2 Physics, Electronics, Modern Physics, Plus Two Physics, questionbank, Revision Tests Tags: electronic devices, question bank, semiconductor, semiconductor devices, semiconductors

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Be the first to comment - What do you think? Posted by admin - June 10, 2011 at 10:29 am

Categories: +2 Physics, DOWNLOADS, Plus Two Physics, Question Bank Tags: download, kendriya vidyalaya, kvs, study materials

Collection of CBSE Class 12 Previous Question Papers

Be the first to comment - What do you think? Posted by admin - February 23, 2011 at 12:38 pm

Categories: Plus Two Physics, previous question papers Tags: class, Collection, paper, Papers, previous question, question, question paper, question papers

Physics Practical

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Be the first to comment - What do you think? Posted by admin - February 3, 2011 at 9:30 am

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CBSE Physics Classs XII Viva Voce – Tips to perform well

Viva Voce is one one of the important factor which decides your overall score in Physics Practical examination.

The external examiner is not knowing what you are really. Viva Voce is the only means to have a direct interaction with you. Therefore your performance in viva has a direct impact on the marks you get in the Practical exam.

Here are some tips for you to excell

Understand the basics. The various experiments you are assigned are based on certain fundamental principles. Understanding these fundamentals are very important.
Boost your confidence: Present yourself in a pleasing manner and answer the questions confidently
Prepare a list of all questions which can be asked from each of the experiments you did at school and also thoroughly revise the related theory part from text book.

The following books will be of great help.

(Dear visitors, you can add your suggestions and questions as comments to this post)

http://www.plustwophysics.com/an-exemplary-viva-voce-cbse-class-xii-physics-practical/

http://www.plustwophysics.com/what-type-of-questions-are-asked-in-viva-voce/