Studied by 1 person
Efficiency
useful output energy transfer / total input energy transfer
power output/ power input
efficiency = useful________ / total________.
thermal energy store
wasted energy is usually transferred into the________.
100% efficient
no device is________.
electric heaters
the only devices that are 100% efficient are________.
insulating them, lubricating them or making them more streamlined
you can improve the efficiency by________.
transfer energy
useful devices are only useful because they________ from one store to another.
more efficient
the less energy that is wasted, the________ the device is said to be.
energy transfers
most________ involve some waste energy
electrostatic energy store
electrical heaters are 100% efficient as all the energy in the ________ is transferred to 'useful' thermal energy store.
Note 
Flashcard (70)