Direct Solar energy is used for
(A) Water heating
(B) Distillation
(C) Drying
(D) All of the above
The efficiency of various types of collectors ______ with _______ temperature.
(A) increases, decreasing
(B) decreases, increasing
(C) remains same, increasing
(D) depends upon type of collector
Which of the following type of collector is used for low temperature systems?
(A) Flat plate collector
(B) Line focussing parabolic collector
(C) Paraboloid dish collector
(D) All of the above
The following is (are) laws of black body radiation.
(A) Plank’s law
(B) Stefan-Boltzmann law
(C) both (A) and (B)
(D) None of the above
What do you mean by time ratio control in DC Choppers?
Global radiation =
(A) Direct radiation – Diffuse Radiation
(B) Direct radiation + Diffuse Radiation
(C) Direct radiation / Diffuse Radiation
(D) Diffuse Radiation / Direct radiation
In the paraboloid dish concept, the concentrator tracks the sun by rotating about
(A) One axes
(B) Two axes
(C) Three axes
(D) None of the above
Define –Non-renewable source of energy?
output voltage from one solar cell is _________
write Stefan- Boltzmann law
In what form is solar energy is radiated from the sun?
a) Ultraviolet Radiation
b) Infrared radiation
c) Electromagnetic waves
d) Transverse waves
Solar radiation which reaches the surface without scattering or absorbed is called
_____________
a) Beam Radiation
b) Infrared radiation
c) Ultraviolet radiation
d) Diffuse radiation
The scattered solar radiation is called ____________
a) Direct Radiation
b) Beam Radiation
c) Diffuse radiation
d) Infrared Radiation
The region where the electrons and holes diffused across the junction is called ________
a) Depletion Junction
b) Depletion region
c) Depletion space
d) Depletion boundary
What is the difference between Photodiode and Solar cell?
a) No External Bias in Photodiode
b) No External Bias in Solar cell
c) Larger surface area in photodiode
d) No difference
A solar cell is a ___________
a) P-type semiconductor
b) N-type semiconductor
c) Intrinsic semiconductor
d) P-N Junction
Which of the following materials cannot be used as solar cells materials?
a) Si
b) GaAs
c) CdS
d) PbS
What are the charge carriers in semiconductors?
a) Electrons and holes
b) Electrons
c) Holes
d) Charges
How are charge carriers produced in intrinsic semiconductors?
a) By pure atoms
b) By electrons
c) By impure atoms
d) By holes
What type of material is obtained when an intrinsic semiconductor is doped with trivalent
impurity?
a) Extrinsic semiconductor
b) Insulator
c) N-type semiconductor
d) P-type semiconductor
The term photo voltaic comes from ________
a) Spanish
b) Greek
c) German
d) English
The volt is the units of emf that was named after its inventor _________
a) Alessandro volta
b) Alxender volta
c) Alexa volta
d) Alexandro volta
The term photo voltaic is in use since _________
a) 1840
b) 1844
c) 1849
d) 1850
When the source of light is not sun light then the photo voltaic cell is used as ____________
a) Photo diode
b) Photo voltaic cell
c) Photo detector
d) Photo transmitter
The region where the electrons and holes diffused across the junction is called ________
a) Depletion Junction
b) Depletion region
c) Depletion space
d) Depletion boundary
The current produce by the solar cell can be given by _________
a) IL – ID + ISh
b) IL + ID – ISh
c) IL + ID + ISh
d) IL – ID – ISh
The amount of photo generated current increases slightly with increase in _________
a) Temperature
b) Photons
c) Diode current
d) Shunt current
Solar cells are made from bulk materials that are cut into wafer of _________ thickness.
a) 120-180μm
b) 120-220μm
c) 180-220μm
d) 180-240μm
__________ is one of the most important materials is also known as solar grade silicon.
a) Crushed silicon
b) Crystalline silicon
c) Powdered silicon
d) Silicon
__________ photo voltaic devices in the form of thin films.
a) Cadmium Telluroide
b) Cadmium oxide
c) Cadmium sulphide
d) Cadmium sulphate
__________ is a direct band gap material.
a) Copper Indium Gallium Selenide
b) Copper Selenide
c) Copper Gallium Telluride
d) Copper Indium Gallium Diselenide
Dye-sensitized solar cells are made from ________ organic dye.
a) Ruthium melallo
b) Aniline
c) Safranine
d) Induline
Quantum dot solar cells are based on _______
a) Gratzel cell
b) Solar cell
c) Voltaic cell
d) Galvanic cell
The quantum dot used are _______
a) Cds
b) CdTe
c) PbO
d) GaAs
Organic polymer solar cells are made from Polyphenylene.
a) True
b) False
Direct Solar energy is used for
(A) Water heating
(B) Distillation
(C) Drying
(D) All of the above
The power from the sun intercepted by the earth is approximately
(A) 1.8 x 108 MW
(B) 1.8 x 1011 MW
(C) 1.8 x 1014 MW
(D) 1.8 x 1017 MW
The following is indirect method of Solar energy utilization
(A) Wind energy
(B) Biomass energy
(C) Wave energy
(D) All of the above
A liquid flat plate collector is usually held tilted in a fixed position, facing _____ if located in the
northern hemisphere.
(A) North
(B) South
(C) East
(D) West
The collection efficiency of Flat plate collector can be improved by
(A) putting a selective coating on the plate
(B) evacuating the space above the absorber plate
(C) both (A) and (B)
(D) None of the above
The efficiency of various types of collectors ______ with _______ temperature.
(A) increases, decreasing
(B) decreases, increasing
(C) remains same, increasing
(D) depends upon type of collector
Maximum efficiency is obtained in
(A) Flat plate collector
(B) Evacuated tube collector
(C) Line focussing collector
(D) Paraboloid dish collector
The following type of energy is stored as latent heat
A) Thermal energy
(B) Chemical energy
(C) Electrical energy
(D) Mechanical energy
Which of the following type of collector is used for low temperature systems?
(A) Flat plate collector
(B) Line focussing parabolic collector
(C) Paraboloid dish collector
(D) All of the above
In the paraboloid dish concept, the concentrator tracks the sun by rotating about
(A) One axes
(B) Two axes
(C) Three axes
(D) None of the above
The sun subtends an angle of _____ minutes at the earth’s surface.
(A) 22
(B) 32
(C) 42
(D) 52
The value of Solar Constant is
(A) 1347 W/m2
(B) 1357 W/m2
(C) 1367 W/m2
(D) 1377 W/m2
The extraterrestrial radiation flux varies by ____ % over a year.
(A) ± 1.1
(B) ± 2.2
(C) ± 3.3
(D) ± 4.4
Absorption of Solar radiations at earth’s surface occur due to presence of
(A) Ozone
(B) Water vapours
(C) Carbon di-oxide
(D) All of the above
Global radiation =
(A) Direct radiation – Diffuse Radiation
(B) Direct radiation + Diffuse Radiation
(C) Direct radiation / Diffuse Radiation
(D) Diffuse Radiation / Direct radiation
The zenith angle is the angle made by the sun’s rays with the ____ to a ______ surface.
(A) normal, horizontal
(B) tangent, horizontal
(C) normal, vertical
(D) tangent, vertical
Solar radiation flux is usually measured with the help of a
(A) Anemometer
(B) Pyranometer
(C) Sunshine recorder
(D) All of the above
Beam radiations are measured with
(A) Anemometer
(B) Pyrheliometer
(C) Sunshine recorder
(D) All of the above
The angle made by the plane surface with the horizontal is known as
(A) Latitude
(B) Slope
(C) Surface azimuth angle
(D) Declination
The angle made in the horizontal plane between the horizontal line due south and the projection
of the normal to the surface on the horizontal plane is
(A) Hour angle
(B) Declination
(C) Surface azimuth angle
(D) Solar altitude angle
Surface azimuth angle varies from
(A) 0 to 90°
(B) -90 to 90°
(C) 0 to 180°
(D) -180° to 180°
The hour angle is equivalent to
(A) 10° per hour
(B) 15° per hour
(C) 20° per hour
(D) 25° per hour
The complement of zenith angle is
(A) Solar altitude angle
(B) Surface azimuth angle
(C) Solar azimuth angle
(D) Slope
The correction has a magnitude of ___ minutes for every degree difference in longitude.
(A) 2
(B) 4
(C) 6
(D) 8
The global radiation reaching a horizontal surface on the earth is given by
(A) Hourly beam radiation + Hourly diffuse radiation
(B) Hourly beam radiation – Hourly diffuse radiation
(C) Hourly beam radiation / Hourly diffuse radiation
(D) Hourly diffuse radiation / Hourly beam radiation
The ratio of the beam radiation flux falling on a tilted surface to that falling on a horizontal
surface is called the
(A) Radiation shape factor
(B) Tilt factor
(C) Slope
(D) None of the above
