RENEWABLE ENERGY PROCESSES EXAM
SCRIPT SOLVED QUESTIONS ACCURATE
ANSWER COLLECTION
●● What are the advantages of renewable energy?
Answer: Generates lower emissions than fossil fuels and helps reduce
pollution.
●● What percentage of total electricity production in South Africa was
contributed by renewable energy in 2021?
Answer: 6.1%
●● What is solar energy?
Answer: Energy sourced from the sun, created by nuclear fusion in the
sun's core.
●● What process in the sun creates solar energy?
Answer: A proton-proton chain reaction where hydrogen atoms fuse to
create helium.
●● What are the two main types of active solar energy technologies?
Answer: Photovoltaic cells (PV cells) and mirrors that focus sunlight.
, ●● What is the photovoltaic effect?
Answer: The process of generating electricity directly from solar
radiation.
●● What materials are commonly used in photovoltaic cells?
Answer: Semiconductors, usually made of silicon.
●● How do photovoltaic cells generate electricity?
Answer: By knocking electrons loose when sunlight is absorbed,
creating an electric current.
●● What is Concentrated Solar Power (CSP)?
Answer: A technology that uses lenses and mirrors to focus sunlight to
generate electricity.
●● What is passive solar energy?
Answer: Energy that does not use equipment but takes advantage of the
local climate for heating and cooling.
●● What is thermal mass in solar architecture?
Answer: The bulk of material in a building that absorbs and retains heat,
such as wood or concrete.
SCRIPT SOLVED QUESTIONS ACCURATE
ANSWER COLLECTION
●● What are the advantages of renewable energy?
Answer: Generates lower emissions than fossil fuels and helps reduce
pollution.
●● What percentage of total electricity production in South Africa was
contributed by renewable energy in 2021?
Answer: 6.1%
●● What is solar energy?
Answer: Energy sourced from the sun, created by nuclear fusion in the
sun's core.
●● What process in the sun creates solar energy?
Answer: A proton-proton chain reaction where hydrogen atoms fuse to
create helium.
●● What are the two main types of active solar energy technologies?
Answer: Photovoltaic cells (PV cells) and mirrors that focus sunlight.
, ●● What is the photovoltaic effect?
Answer: The process of generating electricity directly from solar
radiation.
●● What materials are commonly used in photovoltaic cells?
Answer: Semiconductors, usually made of silicon.
●● How do photovoltaic cells generate electricity?
Answer: By knocking electrons loose when sunlight is absorbed,
creating an electric current.
●● What is Concentrated Solar Power (CSP)?
Answer: A technology that uses lenses and mirrors to focus sunlight to
generate electricity.
●● What is passive solar energy?
Answer: Energy that does not use equipment but takes advantage of the
local climate for heating and cooling.
●● What is thermal mass in solar architecture?
Answer: The bulk of material in a building that absorbs and retains heat,
such as wood or concrete.
