| A | B |
|---|
| The water behind the dam has | potential energy |
| As the water flows through the penstock | it gathers kinetic energy |
| Wave, Wind, Sun and Geothermal | energy is renewable energy |
| Petroleum is a | non-renewable energy resource |
| The energy produced by a hydroelectric power station | comes originally from the sun |
| Photovoltaic cells convert | light energy directly into electrical energy |
| Thermocouples can be used to measure | temperature |
| The temperature of liquid helium | -269 degrees Celsius |
| The temperature of liquid nitrogen | -196 degrees Celsius |
| High voltage on transmission lines cause | electromagnetic fields |
| A solar cell is a | photovoltaic cell |
| A superconductor offers almost no | resistance to the flow of electric current |
| A thermocouple is a device that makes use of the | thermoelectric effect to produce electricity |
| The thermoelectric effect is due to | differences in temperature |
| Piezoelectric Effect is caused by | subjecting certain types of crystal to stress |
