Which device is used to convert solar energy directly into electricity?
Analysis & Theory
Photovoltaic cells (PV cells) convert sunlight directly into electricity using the photovoltaic effect.
What is the main advantage of solar energy?
A
Non-renewable and costly
C
Renewable and non-polluting
D
Available only in deserts
Analysis & Theory
Solar energy is renewable and produces no pollution during operation.
Which part of the solar panel generates electricity?
C
Silicon semiconductor layer
Analysis & Theory
The silicon semiconductor layer is responsible for converting sunlight into electricity.
Which of the following is a disadvantage of solar energy?
B
Pollution during operation
C
Intermittent availability
D
Not suitable for rural areas
Analysis & Theory
Solar energy is intermittent — it depends on weather and sunlight availability.
Which of the following materials is commonly used in PV cells?
Analysis & Theory
Silicon is the most widely used semiconductor material in photovoltaic cells.
What is solar thermal energy primarily used for?
Analysis & Theory
Solar thermal energy is mainly used for heating applications like water heaters or space heating.
Which of the following is NOT a component of a solar power plant?
Analysis & Theory
Compressors are not used in solar power plants; they are used in gas systems.
Solar energy is best described as what type of energy?
Analysis & Theory
Solar energy is radiant energy emitted by the sun in the form of electromagnetic radiation.
What is the efficiency range of typical commercial solar PV panels?
Analysis & Theory
Most commercial PV panels have an efficiency of about 10–20%.
Which country is currently one of the world leaders in solar power capacity?
Analysis & Theory
Germany has been one of the global leaders in solar energy production and installed capacity.