Related Questions

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
What does the underlined word mean in the following sentence?The old man's house, badly in need of paint, was leaning to one side and had holes in the roof, but one side and had holes in the roof, but
A poorly built
B old-fashioned
C run down
D dirty
An intrinsic semiconductor has some holes in it at room temperature. What causes these holes?
A Doping
B Valence electrons
C Free electrons
D Thermal energy
E None of the above
Conduction band electrons have more mobility than holes because they
A Are lighter
B Experience collision less frequently
C Have negative charge
D Need less energy to move them
Thermal conductivity based continuous flue gas analyser makes use of varying thermal conductivity of the constituents of flue gases. Which of the following constituents of flue gases has the maximum thermal conductivity?
A CO2
B N2
C O2
D CO
Two hundred multiples of seven are chosen at random. and 300 multiples of eight are chosen at random. Approximately what percentage of the 500 selected numbers are odd?
A 20%
B 25%
C 40%
D 80%
Height of liquid in agitation tank is normally maintained equal to the tank diameter. However, if the tank is too tall and a large liquid hold up is desired, then two or more impellers mounted on the same shaft may be used. The clearance between the tank bottom and the bottom most impeller should be about (where, D = impeller diameter)
A 0.5 D
B D
C 1.5 D
D 2 D
Which deputed island has been the subject of recent agitation between China and Japan ?
A Senkaku Island
B Kuril Island
C Marshall Island
D Diego Garcia
Read both the statements and then mark your answer.Statement I: The government has recently fixed the fees for professional courses offered by the unaided institutions which are much lower than the fees charged last year.Statement II: The parents of the aspiring students launched a severe agitation last year protesting against the high fees charged by the unaided institutions.
A Statement I is the cause and Statement II is its effect
B Statement II is the cause and Statement I is its effect
C Both the Statement I and II are independent cause
D Both the Statement I and II are independent are effect of some common cause
Power consumption during turbulent flow in agitation tank is proportional to the __________ of the liquid.
A Viscosity
B Thermal conductivity
C Surface tension
D Density

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