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6 8

CrLeptons do not have colour
D:-None of these
Correct Answer:- OptionC
Question66:For a transistor operating in the saturation region,
‏ب‎
‎111.)
‎एय.
‏جا رط کے ما‎
Correct Answer:- Option-D
Question6 7:-Output voltage 1) of the ideal op-amp given below is:
۸1۴
20
೦:2೪
210%
Correct Answer:-Question Cancelled
Question68:The transistor circuit shown uses silicon transistor with Vg = 0.7, Ic =~ /g anda current gain of 100. The value of Vo is,
۸۷
2۷
"0
5۷
Correct Answer:-Question Cancelled
Question69+-A 4-bit D/A converter produces an output valtage of 4.5V for an input code of 1001. Its output voltage for an input code 0011 will be:
‏لام‎
‎71
‎“0
‎0-71
‎Correct Answer:- OptionC
Question70:The variation of drain current with gate-to-source voltage (00 - Vs characteristics) of a MOSFET is shown in figure. The MOSFET ‏,ذا‎

AxAn n-channel depletion mode device
Bu-An n-channel enhancement mode device
CeA p-channel depletion mode device
D:-A p-channel enhancement mode device,
Correct Answer:-Question Cancelled
Question7 1-Nano tubes are structures with confinement in
۸۰2 dimensions
൦3 dimensions
೦: dimensions
D:-zero dimension
Correct Answer:- Option-A
Question72:Unique properties of nano materials can be ascribed to
Aclarge surface to volume ratio
B:-quantum confinement effect
ക confinement
De-all of the above
Correct Answer:- Option-D
Question73-CNT can be metallic if the chiral vector (nm)
‏ويم‎ =
‏د امھ طط 3/(سد)-:ظ‎ ളേ
Cinm=0
Dinm
Correct Answer:- OptionC
Question74+An example of top down approach in nano technology is
Avsputtering
B:-vapour deposition
ol gel technique
Demilling
Correct Answer:- Option-D
Question75-Ballistic quantum conductance is related to
AxSpace technology
உண
00
ப்‌
Correct Answer:- Option B
Question76:- An important feature of Big Bang cosmology that is supported by observational astronomy 15 that the universe
Ais increasing its total mass over time
Buis expanding at an accelerating rate
Cuis formed from an earlier collapsed universe
D:-contains a great deal of dark matter
Correct Answer:- Option-B
Question?7: Pulsars are stars that give off precisely spaced bursts of radiation. Which of the following is responsible for this phenomenon?
A:The strong magnetic field of a neutron star causes it to emit radiation in fwo narrow beams that sweep by Earth as the star spins
B:-The presence of a neutron star orbiting very close to the pulsar causes a recurring increase in the pulsar's energy output.
G The buildup and collapse of a neutron star's magnetic field repels and attracts ionized gases on the star's surface.
D:The low mass of a pulsar produces alternating cycles of nuclear fusion and chemical burning that release different amounts of energy.
Correct Answer:- Option-A
Question78: In a typical H-R diagram, stars are graphed by these two characteristics
A:Distance and temperature
B:Luminosity and distance
CeTemperature and luminosity
D:-Size and distance
Correct Answer:- Option-C
Question79: Which of the following appliances use solar photovoltaic technology?
Ax-Solar lantern
B:-Solar water heater
Cx-Solar air heater
De-all of the above
Correct Answer:- Option-A
Questiona0:The value of solar constant is approximately

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04/24/2015 12:06 PM