Let's go through each question one by one and provide detailed explanations for the answers.
#### Q1: What cell is used to convert solar energy directly into electrical energy?
a) Dry cell
b) Photovoltaic cell
c) Sulfate
d) Wet cell
Answer:
The cell used to convert solar energy directly into electrical energy is a Photovoltaic cell (b). Photovoltaic cells, commonly known as solar cells, are specifically designed to capture sunlight and convert it into electrical energy through the photovoltaic effect.
#### Q2: In solar cells, which material is used?
a) Copper
b) Silver
c) Silicon
d) Alumina
Answer:
The primary material used in solar cells is Silicon (c). Silicon is the most commonly used semiconductor material in photovoltaic cells due to its abundant availability and suitable electrical properties for efficient energy conversion.
#### Q3: Name one advantage of Solar cells:
a) Maintenance is very low.
b) Maintenance is very high.
c) It's costly to install.
d) Doesn't stay long.
Answer:
One significant advantage of solar cells is that "Maintenance is very low" (a). Solar cells require minimal maintenance compared to other power generation systems; they mostly need periodic cleaning and occasional inspections.
#### Q4: How many types of solar cells are there based on the crystal structure?
a) One
b) Two
c) Three
d) Four
Answer:
There are Three (c) types of solar cells based on the crystal structure: monocrystalline, polycrystalline, and thin-film solar cells. Each type varies based on the silicon crystal structure and manufacturing process.
#### Q5: How much voltage does a single solar cell produce?
a) 1 V
b) 0.5 V
c) 0.05 V
Answer:
A single solar cell generally produces about 0.5 V (b). This voltage is typical for a cell under standard test conditions and is the basic unit for constructing solar panels that generate higher voltages through the series connection of multiple cells.
By understanding the correct answers to these questions, you get a better grasp of the basic concepts related to solar cells and their applications in solar energy systems.
