What are the advantages of photocells?

do not contribute to global warming

use a renewable energy resource

They do not work when dark or cloudy

They produce no CO2 emissions in their total product lifetime

The current from a dynamo can be increased by...

Increasing the number of turns on the coil

Using thinner wire to decrease resistance

Increase the surrounding temperature

Moving the magnet up and down, as well as rotating it

Quiz

Alice 8956 7 questions 4.2 (4 ratings)

Take the quiz

1What are the advantages of photocells?
1. ARobust
2. Bdo not need maintenance
3. Cno fuel needed
4. Dno long power cables needed
5. Eno pollution
6. Fdo not contribute to global warming
7. Guse a renewable energy resource
8. HThey do not work when dark or cloudy
9. IThey produce no CO2 emissions in their total product lifetime
2Photocells are made of a conductive material - silicon
1. ATrue
2. BFalse
3Glass is transparent to...
1. AShort wavelength radiation
2. BLong wavelength radiation
4Solar reflectors are moved by the computer to ensure that they are always facing the sun
1. ATrue
2. BFalse
5The energy produced by a wind farm depends upon...
1. Athe size of the wind turbine
2. Bthe speed of the wind
3. Cthe direction of the wind
6Some people hate wind turbines because they spoil the view
1. ATrue
2. BFalse
7The current from a dynamo can be increased by...
1. AUsing a stronger magnet
2. BIncreasing the number of turns on the coil
3. CRotating the magnet faster
4. DUsing thinner wire to decrease resistance
5. EIncrease the surrounding temperature
6. FSlowing down the magnet
7. GMoving the magnet up and down, as well as rotating it