NEW
Font size
WorksheetsSolar and Wind Energy
Total questions: 10
Worksheet time: 5mins
In a photovoltaic (PV) solar panel ________ energy is converted to _________.
radiant (solar), electrical
electrical, radiant (solar)
thermal, radiant (solar)
radiant (solar), thermal
In a solar heating panel ________ energy is converted to _________.
radiant (solar), electrical
electrical, thermal
thermal, radiant (solar)
radiant (solar), thermal
Power per unit area is the basic definition of what physics quantity?
Intensity
Efficiency
Field strength
Impulse
Solar power is different to the other primary energy sources because it
does not require a turbine to produce electricity
it is a renewable energy source
it does not produce carbon dioxide
it can be used to produce electricity or thermal energy
A wind turbine produces average power P. If the wind speed is reduced in half, what is the new average power.
2P
P/2
P/4
P/8
A wind turbine has average power output P. If the blade length of the turbine is tripled, what is the new average power?
3P
9P
27P
P/3
The equation P =1/2 A p v3 is a calculation of maximum power input and not real power input because . . .
The blades do not turn at a constant speed
The air does not completely stop when it hits the blades
All of the air molecules will hit the blades
The blades may hit birds that fly too close
Calculate the minimum area of solar heating panels required to heat 100 kg of water (4180 J kg-1 K-1) from 20.°C to 40.°C in 2.0 hours. (solar constant 1360 W m-2).
0.85 m2
3073 m2
1161 m2
58 m2
Calculate the area needed for PV panels with an efficiency of 21% to charge a battery that stores 9.0 MJ in 8 hours of daylight. (solar constant 1360 W m-2)
1.1 m2
174 m2
0.048 m2
1488 m2
Determine the minimum blade length needed for a 85 % efficient wind turbine that needs to sustain an output power of 360 W with a wind speed of 2.5 m s-1. (air density is 1.3 kg m-3)
3.6 m
1.8 m
11 m
5.8 m
