Answer
427.5k+ views
Hint-The integrated circuits are made up of hundreds of transistors, resistors, capacitors etc. The integrated circuits are used as amplifiers, oscillators, microprocessors, memory elements etc. The transistors are made up of semiconductors. It is the fusing of oppositely doped semiconductors in between the similarly doped semiconductors. There are two types of transistors. They are NPN and PNP according to the fusion of doping materials.
Complete step by step answer:
(i) In PNP transistors, the negatively doped semiconductor is placed in between the two positively doped semiconductors. Hence there are more holes in the transistor. It provides positive power to the output. Thus, it is called as “sourcing sensors”
(ii) In NPN transistors, the positively doped semiconductor is placed in between two negatively doped semiconductors, hence there are more electrons in this transistor. It sinks the ground to the output. Thus, it is called as “sinking sensors”
(iii) In both transistors the charge carriers are holes and electrons. The charge carriers’ electrons and holes diffuse into the material. This movement of charge carriers causes diffusion. The diffusion causes the current to flow in the semiconductor material.
(iv)The diffusion constant is low in the NPN transistors. Hence it is used in the integrated circuits.
Thus, the correct option is B.
Note:
The transistors are used as oscillators and amplifiers. In the transistor, unless the current flows in the base circuit, there is no current that can flow in the collector circuit. This property allows the transistors to work as a switch.
Note In integrated circuits, NPN construction is preferred to PNP construction because:
A) NPN construction is cheaper.
B) n-type is preferred for reducing the diffusion constant.
C) NPN construction permits higher packing of elements.
Complete step by step answer:
(i) In PNP transistors, the negatively doped semiconductor is placed in between the two positively doped semiconductors. Hence there are more holes in the transistor. It provides positive power to the output. Thus, it is called as “sourcing sensors”
(ii) In NPN transistors, the positively doped semiconductor is placed in between two negatively doped semiconductors, hence there are more electrons in this transistor. It sinks the ground to the output. Thus, it is called as “sinking sensors”
(iii) In both transistors the charge carriers are holes and electrons. The charge carriers’ electrons and holes diffuse into the material. This movement of charge carriers causes diffusion. The diffusion causes the current to flow in the semiconductor material.
(iv)The diffusion constant is low in the NPN transistors. Hence it is used in the integrated circuits.
Thus, the correct option is B.
Note:
The transistors are used as oscillators and amplifiers. In the transistor, unless the current flows in the base circuit, there is no current that can flow in the collector circuit. This property allows the transistors to work as a switch.
Note In integrated circuits, NPN construction is preferred to PNP construction because:
A) NPN construction is cheaper.
B) n-type is preferred for reducing the diffusion constant.
C) NPN construction permits higher packing of elements.
Recently Updated Pages
Mark and label the given geoinformation on the outline class 11 social science CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
When people say No pun intended what does that mea class 8 english CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Name the states which share their boundary with Indias class 9 social science CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Give an account of the Northern Plains of India class 9 social science CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Change the following sentences into negative and interrogative class 10 english CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Advantages and disadvantages of science
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Trending doubts
Bimbisara was the founder of dynasty A Nanda B Haryanka class 6 social science CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Which are the Top 10 Largest Countries of the World?
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Difference between Prokaryotic cell and Eukaryotic class 11 biology CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Differentiate between homogeneous and heterogeneous class 12 chemistry CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
10 examples of evaporation in daily life with explanations
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Fill the blanks with the suitable prepositions 1 The class 9 english CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Give 10 examples for herbs , shrubs , climbers , creepers
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
How do you graph the function fx 4x class 9 maths CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Difference Between Plant Cell and Animal Cell
![arrow-right](/cdn/images/seo-templates/arrow-right.png)