Solar cell

Solar cells convert light into electricity by using semiconductor materials like silicon. When light strikes the silicon, it releases electrons, generating an electric current. The efficiency of these cells is improving with technological advancements, currently reaching around 30%.

What is the primary material used in solar cells to convert light into electricity?

• Iron

• Aluminum

• Silicon

• Copper

What happens when light strikes the semiconductor material in a solar cell?

• It becomes magnetic

• It releases electrons

• It heats up the material

• It changes color

What is the role of electrons in the process of generating electricity in solar cells?

• They absorb light

• They reflect light

• They generate current

• They create heat

How has the efficiency of solar cells changed with technological advancements?

• It has remained the same

• It has decreased

• It has fluctuated

• It has improved

What is the current efficiency level of solar cells as mentioned in the video?

• 20%

• 10%

• 40%

• 30%