Related Questions

If no multivalued attributes exist and no partial dependencies exist in a relation, then the relation is in what normal form?
A First normal form
B Second normal form
C Third normal form
D Fourth normal form
In an intrinsic semiconductor, the number of free electrons
A Equals the number of holes
B Is less than the number of holes
C Is greater than the number of holes
D Impossible to say
E None of the above
Materials with lots of free electrons are called
A Conductors
B Insulators
C Semiconductors
D Filters
The number of free electrons and holes in intrinsic semiconductor increases when the temperature
A Decreases
B Increases
C Stays the same
D 0oC
E None of the above
How many free electrons does a p type semiconductor has?
A Only those produced by thermal energy
B Only those produced by doping
C Those produced by doping as well as thermal energy
D Any of the above
The substances which have a large number of free electrons and offer a low resistance are called
A Insulators
B Inductors
C Semiconductors
D Conductors
Free electrons make current possible.
A True
B False
The random motion of holes and free electrons due to thermal agitation is called ___________
A Diffusion
B Pressure
C Ionisation
D None of the above
Addition polymerisation takes place either by a free radical mechanism or ionic machanism depending on the reagents used. Free radical polymerisation is catelyzed by __________ , which decompose to give free radicals.
A Organic peroxides
B Sulphuric acid
C Hydroflouric acid
D None of these
নাইট্রেট অ্যানায়নে কয়টি এলেকট্রন রয়েছে? (How many electrons are present in a nitrate anion?)
A 19
B 23
C 31
D 32

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