WORKSHOP SCIENCE & CALCULATION
ELECTRONIC MECHANICS (3rd Sem)
1)
Write down the number of valence electrons in conductors, semiconductors and
insulators. (2)
2)
What are the different types of conductors? (4)
3)
The process of adding impurities to an intrinsic semiconductor to increase its
conductivity is called…………. (2)
4)
Name two intrinsic semiconductors. (2)
5)
A mass of iron or other material which has the property of attracting pieces of
iron is called….. (2)
6)
Name a natural a magnet. (2)
7)
S.I. unit of magnetic flux is…….. (2)
8)
The ability of a magnet to emit magnetic lines of force is called….. (2)
9)
The unit of reluctance is…….. (2)
10)
What are the different shapes of magnets? (4)
11)
A flux of 400µWb passes through an area of 0.0005m2. What is the
flux density in tesla unit? (4)
12)
What are the types of semiconductors? (2)
13)
Define n-type and p-type semiconductors and state the dopants used in them? (4)
14)
The pressure is measured by the height of column of ………… in a Barometer. (2)
15)
The resistance of a material ……… as the length of the conductor increases. (2)
16)
Define Pressure. (3)
17)
Unit of pressure in MKS system. (2)
18)
1 bar = ………Pa (3)
19)
Write any four applications of pneumatics. (4)
20)
Write the equation for finding absolute pressure? (3)
21)
………..is the device used to measure atmospheric pressure. (2)
22)
Which of the following is a mechanical pressure gauge?
A)
Open tube type B) Differential
type C) Diaphram type D) Inverted type (2)
23)
The property of a material to attract pieces of ferrous materials is called…….. (2)
24)
…………..is the imaginary line joining the two poles of a magnet. (2)
25)
Define the term ‘non-hydroscopic’? (3)
26)
The pressure exerted by air is called………….. (2)
27)
The main property of insulating material is……….. (2)
28)
The formula for flux density is……… (3)
29)
The smallest unit of pressure is…….. (2)
30)
The reciprocal of permeability is……… (2)
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