Related Questions

In case of antenna the ratio of the power radiated in the desired direction to the power radiated in the opposite direction is known as
A Transmission efficiency
B Front to back ratio
C Loss coefficient
D None of the above
For a perfect gas, according to Boyle’s law (where p = Absolute pressure, v = Volume and T = Absolute temperature)
A $$\frac{{\text{v}}}{{\text{T}}}$$ = constant, if p is kept constant
B pv = constant, if T is kept constant
C $$\frac{{\text{T}}}{{\text{p}}}$$ = constant, if v is kept constant
D $$\frac{{\text{p}}}{{\text{T}}}$$ = constant, if v is kept constant
The absolute entropy for all crystalline substances at absolute zero temperature is
A Zero
B Negative
C More than zero
D Indeterminate
In what form is solar energy is radiated from the sun?
A Ultraviolet Radiation
B Infrared radiation
C Electromagnetic waves
D Transverse waves
The energy radiated by sun on a bright sunny day is approximately
A 700 W/m2
B 800 W/m2
C 1 kW/m2
D 2 kW/m2
Which of the following is most important for absorption of heat radiated from the Sun as well as from the Earth?
A Carbon dioxide
B Oxygen
C Carbon monoxide
D Nitrogen
The digitizing technology that uses an electric field radiated from the tablet and picked up by a cursor is:
A electromagnetic
B raster
C sonic
D electrostic
E None of the above
Which of the following absorbs the insolation from the sun and preserves the earth's radiated heat, thus acting like a blanket allowing the earth neither to become too cold nor too hot?
A Dust
B Water vapour
C Ozone
D Nitrogen
How much radiant energy will an object emit if its temperature is at absolute zero?
A The maximum theoretical amount
B None
C The same as it would at any other temperature
D Depends on the chemical composition of the object
Kinetic energy of the molecules in terms of absolute temperature (T) is proportional to
A T
B J
C J2
D Vr

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