Understanding Solar Power

What percentage of the global energy distribution was made up by solar and wind power combined as of 2015?

• 5%

• 10%

• 2%

• 15%

Which type of solar power plant uses mirrors to focus sunlight on a single point?

• Wind turbine

• Hydroelectric dam

• Thermal solar power plant

• Photovoltaic panel

What is the primary effect utilized by photovoltaic panels to generate electricity?

• Thermal effect

• Magnetic effect

• Gravitational effect

• Photoelectric effect

How is intensity measured in the context of solar power?

• Lumens per square meter

• Kilowatts per hour

• Watts per meter squared

• Joules per second

What happens to the intensity of sunlight when it hits a surface at a 90-degree angle?

• It is minimized

• It is maximized

• It is halved

• It is doubled

Why do solar panels need to be angled differently at various locations on Earth?

• To prevent water accumulation

• To reduce wind resistance

• To avoid overheating

• To maximize exposure to sunlight

What is the best angle for a solar panel relative to the Earth's surface?

• Parallel to the ground

• Perpendicular to the sun's rays

• 45 degrees to the ground

• Aligned with the equator

How does the Earth's tilt affect solar panel efficiency?

• It increases the panel's temperature

• It reduces the panel's lifespan

• It changes the angle of sunlight

• It has no effect

In the example problem, what is the efficiency of the solar panel used?

• 10%

• 15%

• 25%

• 20%

What is the calculated size of the solar panel needed in the example problem?

• 7 square meters

• 6 square meters

• 5 square meters

• 4 square meters