40 Questions
What is the principle behind solar photovoltaic cells?
Photovoltaic effect
What is the key component in a solar PV cell?
Semiconductor material
What is the purpose of doping in a solar PV cell?
To create regions with excess electrons and holes
What type of material is used to make metal contacts in a solar PV cell?
Aluminium
What is the purpose of the anti-reflective coating in a solar PV cell?
To minimize the reflection of sunlight
What is the structure formed by silicon atoms in a solar PV cell?
Crystal lattice
What happens when light strikes the semiconductor material in a solar PV cell?
Electrons are excited
What is the result of the p-n junction in a solar PV cell?
Creation of an electric current
What is the primary purpose of the protective material in a solar cell?
To shield the semiconductor from environmental factors
What happens when photons strike the semiconductor material in a solar cell?
They transfer their energy to electrons in the semiconductor
What is the function of the metal contacts in a solar cell?
To allow the electric current to be extracted for external use
What is the purpose of an inverter in a solar cell system?
To convert DC to AC
What is the effect of temperature on the efficiency of a solar cell?
It decreases the efficiency
What is the working principle of a fuel cell?
It converts chemical energy into electricity
What is the reaction that occurs at the anode in a fuel cell?
2H2 → 4H+ + 4e-
What type of fuel cell uses a solid polymer electrolyte?
Proton Exchange Membrane Fuel Cell
What is the operating temperature of a Solid Oxide Fuel Cell (SOFC)?
Around 800-1,000°C
Which type of fuel cell is commonly used in portable electronic devices?
Direct Methanol Fuel Cell (DMFC)
What is the primary application of Phosphoric Acid Fuel Cell (PAFC)?
Stationary power plants
What is the primary purpose of fuel cells in military applications?
All of the above
What is the primary advantage of the Hot Dry Rock (HDR) system?
All of the above
What is the primary concern in Hot Dry Rock (HDR) systems?
Seismic risks
What is the primary purpose of hydraulic fracturing in the Hot Dry Rock (HDR) system?
To create fractures in hot rocks
What is the ultimate goal of the Hot Dry Rock (HDR) system?
To generate electricity
What can the injection of water at high pressure cause in rocks?
Rock fractures
What is the primary application of HDR systems?
Electricity generation
What is required for the success of HDR systems?
Hot rocks at sufficient depths
What is the characteristic of vapour-dominated systems?
Found in high-temperature reservoirs
What is the purpose of a separator or flash tank in flash steam systems?
To reduce pressure
What is the advantage of binary fluid systems?
Allows electricity generation at lower temperatures
What is the characteristic of total flow concept systems?
Combines direct use and electricity generation
What is the current status of HDR systems?
Still being explored and researched
What is the first application of hot geothermal fluid?
Heating buildings
What is the purpose of using binary cycle systems in geothermal energy?
To generate electricity from low-temperature resources
What is the advantage of using the total flow concept in geothermal energy?
Maximizing the benefits of the geothermal fluid
What factor determines the choice of geothermal technology?
Reservoir temperature
What is the relationship between the geothermal resource and the desired applications?
The geothermal resource affects the desired applications
What is the main benefit of using geothermal energy for heating and electricity production?
Maximizing the utilization of the geothermal resource
What is the primary goal of geothermal energy projects?
To maximize the benefits of the geothermal fluid
What is the significance of the total flow concept in geothermal energy projects?
It maximizes the benefits of the geothermal fluid
Learn about the principle, construction, and working of solar photovoltaic cells, including the conversion efficiency. Explore how solar PV cells convert sunlight directly into electricity using the photovoltaic effect and semiconductor materials.
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