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Solar Energy Questions and Answers

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This article lists 100 Solar Energy MCQs for engineering students. All the Solar Energy Questions & Answers given below includes solution and where possible link to the relevant topic. This is helpful for users who are preparing for their exams, interviews, or professionals who would like to brush up their fundamentals on Solar Energy topic which is core in Electronics & Electrical Engineering.

In solar energy, the word solar denotes sun whereas energy means the energy of the sun. The sun is the ultimate source of energy for human beings which emits indirectly visible radiation light energy, infrared radiations, heat energy, and a very small amount of ultraviolet radiation. The infrared radiations and the visible radiations are collectively known as solar energy. The earth receives solar energy directly from the sunlight. We are getting solar energy using some scientific techniques.

The solar panels or photovoltaic panels convert sunlight directly into electric current. The main disadvantage of solar panels is, at night time it doesn’t work and the cost of installation is very high. The main advantages of solar energy are reliability, predictability, uninterruptible, low maintenance, free of cost, no pollution, and performance is good. We can use solar energy directly to heat the water, lighting, cooking, passive heating, to charge the portable devices, attic ventilation, inverter and cooling.

1). The Zenith Angle complement is ________
HintThe solar altitude angle is the zenith angle complement
2). Which Meter is used to measure the Beam Radiations ________
HintThe meter which is used to measure the beam radiations is a pyrheliometer.
3). How many types of solar cells?
HintThey are mono silicon crystalline, polycrystalline silicon & amorphous silicon crystalline
4). In which collector the efficiency is maximum ________
HintIn paraboloid dish collector, the efficiency is maximum compared with other collectors
5). The solar cell efficiency is about ________
HintThe efficiency of the solar cell is about 15%
6). The source of energy used for satellites is __________
HintThe source of energy used for satellites is solar cells
7). The Pyranometer measures _________
HintThe pyranometer measures both direct and diffuse radiations
8). The single solar cell voltage is about _______
HintThe single solar cell voltage is about 0.5 V
9). The solar heater function is to convert the solar energy in to ________
HintThe function of the solar heater is to convert the solar energy into thermal energy
10). The solar heater life span is around _________
HintThe payback period of solar water heater is up to 2-6 years
11). The radiation of solar includes ____________
HintThe radiation of solar includes radio waves, infrared waves, x and gamma rays, ultraviolet light, and visible light.
12). Which cell is used to converts solar energy directly into electrical energy ________
HintThe PV cell is used to convert solar energy directly into an electrical energy
13). Which of the following is the most dangerous type of radiation ________
HintAlpha radiation is the most dangerous type of radiation
14). The energy which is stored as latent heat is called as _______ energy
HintThe energy which is stored as latent heat is called thermal energy
15). The solar energy directly used for ______
HintSolar energy directly used for drying, water heating, distillation
16). The nuclear radiation unit is ______
HintThe unit of nuclear radiation is roentgen
17). The standard form of HHW is __________
HintThe full form of HHW is High-Level Waste
18). _________ radiation is called as a diffuse radiation
HintThe scattered solar radiation is also called a diffuse radiation
19). Which type of radiation reaches the surface without absorption or without scattering?
HintThe type of radiation that reaches the surface without absorbed or without scattering is beam radiation
20). From the sun the solar energy is radiated in the form of ___________ waves
HintSolar energy is radiated in the form of electromagnetic waves
21). The less insolation occurs when the sun is ________
HintLow in the sky
22). In solar cells _________ material is used
HintSilicon
23). The range of solar cell efficiency is
HintThe range of solar cell efficiency is about 10-15%
24). In aircrafts _____________ batteries are used
HintThe batteries which are used in aircraft is nickel-iron battery

Solar Energy Interview Questions

25). The sun emits ______________ radiations
HintAll of the above
26). Visible radiations gives ______________ energy
HintThe visible radiations give light energy
27). Infrared radiations gives ______________ energy
HintThe infrared radiations give heat energy
28). The Infrared radiations, visible radiations and small amount of ultraviolet radiations are collectively known as ______________ energy
HintSolar energy
29). In how many ways we can harness solar energy?
HintIn two ways we can harness the solar energy they are direct way and indirect way
30). Plants convert solar energy into ____________ energy
HintThe plants convert solar energy into chemical energy
31). The solar constant also called as ____________
HintThe solar constant is also called solar intensity
32). The formula of solar constant is ________
HintThe formula of solar constant is s=(R/r)2. σT4, where R is the radius of the sun, T is the temperature of the sun, and r is the average distance between the sun and earth.
33). The solar cell has __________
HintThe solar has three generations they are first, second and third generations.
34). What is the S.I unit of the solar constant?
HintThe S.I unit of the solar constant is W/m2
35). What is the solar constant value?
HintThe solar constant is 1.4*103 W/m2
36). The formula of the surface temperature of the sun is ________
HintThe formula of the surface temperature of the sun is T4= (R/r)2 (s/σ). Where T is the temperature of the sun, r is the average distance between the sun and earth, s is the solar constant, σ is the Stefans constant, and R is the radius of the sun.
37). What are the non-renewable energy sources of energy?
HintFossil fuels such as coal and petroleum are the non-renewable sources of energy because these sources cannot be regenerated or we can say that the supply of these sources is limited
38). Solar energy can leads to generate the electricity through ______
HintSolar energy can leads to generate electricity through heat engines and photovoltaics.
39). The solar energy is essentially useful in _________ contexts
HintSolar energy is essentially useful in two contexts they are solar thermal and solar photovoltaics
40). The high temperature in the concentrating solar technologies divided into how many parts?
HintThe high temperature in the concentrating solar technologies divided into two parts they are central tower collectors, and parabolic dish collectors
41). Choose the odd one out
HintBiomass is the renewable sources of energy and the remaining are the non-renewable sources of energy
42). What are the drawbacks of the solar cooker?
HintThe solar cooker is very easy to design but the drawback of the solar cooker is it doesn’t work at night times when there is no sunlight and it takes more time to cook the food.
43). How many layers do solar cells consist of?
HintThe solar cell is made up of silicon and it consists of two layers they are silicon boron layer and the silicon arsenic layer
44). What are the advantages of the solar cells?
HintThere are many advantages of using solar cells over other sources of energy first is that they don’t cause any pollution and the maintenance is very low.
45). What are the drawbacks of using solar cells?
HintSome of the drawbacks of using solar cells are the efficiency is low, manufacturing is very expensive, and the wires which are used for connection is made up of silver
46). What is the importance of solar energy?
HintSolar energy protects the environment, saves your money, and the maintenance cost of solar energy is very low or we can say that almost negligible
47). What are the different methods of solar energy utilizations?
HintThere are two methods of solar energy utilizations they are the direct method and indirect method
48). The direct method of solar energy utilization can be classified into ______?
HintThe direct method of solar energy utilization can be classified into two they are solar thermal and solar photovoltaic

Renewable Energy Questions and Answers

49). __________ comes under the indirect method of solar energy utilization
HintThe water power, wind, wave energy, marine currents, OTEC, and biomass comes under the indirect method of solar energy utilization
50). The efficiency achieved from solar thermal energy is almost __________
HintIn solar thermal energy, the efficiency range is between 20-45%
51). The medium temperature in the concentrating solar technologies divided into how many parts?
HintThe medium temperature in the concentrating solar technologies divided into two parts they are parabolic trough collectors (PTC), and fresnel collectors
52). The thin bottom layer of the semiconductor in the solar cell is also called as _______
HintThe thin bottom layer of the semiconductor in the solar cell is also called a positive type or P-type
53). The concentrating solar technologies divided into how many parts?
HintThe concentrating solar technologies are divided into three parts they are low temperature, medium temperature, and high temperature.
54). The low temperature in the concentrating solar technologies divided into how many parts?
HintThe low temperature in the concentrating solar technologies is divided into three parts they are flat plate collectors, solar chimney, and solar pond.
55). The efficiency achieved from photovoltaic is almost __________
HintIn photovoltaic technology, the efficiency range is between 19-24% that is also for the single junction silicon (si).
56). The solar photovoltaics efficiency varies between ___________
HintThe efficiency of solar photovoltaics varies between 8-40%
57). The total efficiency of the solar thermal power plant is divided into ________
HintThe total efficiency of the solar thermal power plant is divided into two parts they are sunlight to heat conversion process or maybe the receiver efficiency and the other one is heat to electricity conversion process or maybe the generator efficiency.
58). What are the layers which improve the receiver efficiency of solar thermal energy?
HintThe anti-reflective layer coated tube and absorber layer coated tubes improve the efficiency of the receiver
59). The coating materials which are used in solar absorber should possess the _________ properties
HintThe solar absorber should possess the properties like high absorptivity, low emissivity, strong adhesion, high durability, high thermal conductivity, corrosion, and wear resistance
60). What is the source of solar energy?
HintNuclear fusion is the source of energy. Nuclear fusion means the two small hydrogen atoms used together to form helium.
61). How many parts does solar energy have?
HintSolar energy has three major parts
62). The semiconductor is the part of the solar cell that has ___________
HintThe semiconductor is the part of the solar cell that has three layers they are top, bottom, and middle layers.
63). The solar radiation range in the visible rays is about _______
HintThe solar radiation range invisible rays is about 42-43%
64). The solar radiation range in infrared is about _______
HintThe solar radiation range in infrared is about 52-53%
65). The solar radiation range in ultraviolet is about _______
HintThe solar radiation range in ultraviolet is about 3-5%
66). How many types of solar cells are there based on the crystal structure?
HintThe three types of solar cells are based on the crystal structure.
67). What are the parts of solar energy?
HintThe three major parts of solar radiation or solar energy are the visible part, infrared part, and ultraviolet part.
68). What are the characteristics of the solar cells?
HintThe open-circuit voltage and short circuit current, fill factor, and power conversion efficiency are the characteristics of the solar cells
69). What is the most commonly used renewable energy?
HintThe most commonly used renewable energy source is solar energy
70). What is the basic component of the PV system (Photovoltaic system)?
HintThe basic component of the photovoltaic system is the solar cell
71). How much voltage does a single solar cell produce?
HintThe single solar cell has a capacity to produce 0.5 volts of electricity
72). The efficiency of the poly crystalline silicon solar cell is about __________
HintThe efficiency of the polycrystalline silicon solar cell is about 13-15% which is less than the monocrystalline silicon solar cell
73). The semiconductor is the part of the solar cell that has ___________
HintThe semiconductor is the part of the solar cell that has three layers they are top, bottom, and middle layers.
74). The types of solar cells based on the crystal structure are _________

Renewable Energy Quiz Questions and Answers

75). The top layer of the semiconductor in the solar cell is also called as _______
HintThe top layer in the solar cell is also called a negative type or N-type
76). The top layer of the semiconductor in the solar cell consists of _______
HintThe thin top layer of the semiconductor in the solar cell consists of silicon and a very tiny amount of an element such as phosphorous that has more electrons than silicon.
77). The thin bottom layer of the semiconductor in the solar cell consists of _______
HintThe thin bottom layer of the semiconductor in the solar cell consists of silicon and an element such as boron
Read More about Semiconductors
78). The solar cookers utilizes the ___________ energy to cook food
HintThe solar cookers utilize the infrared energy of the sun and by using the solar cooker we can easily cook the food
79). A combination of solar panels connected together is known as ______
HintThe combination of solar panels connected together is known as a solar array and can be used to achieve the required current and voltage
80). What are the renewable energy sources of energy?
HintThe energy from the sun, flowing water, wind, ocean waves are the renewable sources of energy because these sources can be regenerated or we can say that the supply of these sources is unlimited
81). How many components does solar energy have?
HintSolar energy has two major components they are heat and light.
82). What are the renewable sources of energy?
HintThere are a total of seven renewable sources of energy they are the ocean, wind, hydrogen, biomass, geothermal, hydroelectric, and solar energy
83). Choose an odd one out
HintFossil fuels are the non-renewable sources of energy and the remaining are the renewable sources of energy
84). Which materials are required to make the solar cooker?
HintThe materials which we need to make the solar cooker is the aluminum sheet, wooden box, reflector, glass slab, and black paint
85). The formula of energy emitted or energy radiated (p) by the sun is __________
86). The first generation of solar cell consists of __________
HintThe first generation of the solar cell consists of a large area, high quality, and single junction devices. It involves high energy and labor inputs to prevent any significant progress in reducing production costs.
87). The efficiency of the first generation of solar cell is about _______
HintThe first generation of solar cell efficiency is about 15-20%
88). The solar constant value is ________
HintThe constant value of the solar for the earth is 1366 W/m2, which means on the earth surface when the earth is at a mean distance from the sun
89). The efficiency of monocrystalline silicon solar cell is about __________
HintThe monocrystalline silicon solar cell is pure and defends free and the monocrystalline silicon solar cell efficiency is high that is from 14-17%
90). In polycrystalline silicon solar cell which material is used as a raw material?
HintThe liquid silicon is used as a raw material in polycrystalline silicon solar cell and this polycrystalline silicon is obtained and followed by the solidification process
91). The deficiency of polycrystalline silicon solar cell is ________
HintThe deficiency of polycrystalline silicon solar cell is less than monocrystalline silicon solar cell
92). What are the materials required for the construction of solar cells?
HintThe materials required for the construction of solar cells are P-type and N-type materials, where P-type material is doped with a trivalent impurity, and N-type material is doped with a pentavalent impurity
93). The efficiency of amorphous silicon solar cell is about __________
HintThe amorphous silicon solar cell efficiency is between 5-7%, the efficiency of this solar cell is less than other solar cells and it is used for low power equipment.
94). Who observed the materials which turn light into energy?
HintEdmund Becquerel observed the materials which turn light into energy in the year 1839
95). Who has seen the direct conversion of solar radiation into mechanical power?
HintAugust Mouchout who has seen the direct conversion of solar radiation into mechanical power in the year 1860
96). Who developed perovskite materials into the solar cells?
HintIn 2009, Miyasaka developed perovskite materials into the solar cells
97). The solar energy divided in to _________
HintBasically the solar energy divided into two parts one is active and another one is passive
98). The photovoltaics divided in to _________
HintPhotovoltaics is the active solar energy which is divided into two parts one is called the crystalline and another one is called the thin films.
99). The main components of the solar thermal power systems are ___________
HintThe reflectors and receiver are the main components in the solar thermal power systems because the mirrors capture and focus sunlight onto a receiver.
Read More about Electrical and Electronic Components
100). Which meter is used to measure the solar radiation flux ________
HintThe meter which is used to measure the solar radiation flux is pyranometer
101). The solar water heater payback period is up to _______
HintThe payback period of solar water heater is up to 2-6 years

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