ENERGY AND POWER Flashcards
1
Q
what is power?
A
the energy supply per second
2
Q
the more powerful an appliance is
A
the faster the rate at which it transfers energy
3
Q
P = E/t
A
power(W) = energy transferred to appliance(J)/time taken for energy to be transferred(s)
4
Q
power wasted =
A
total power in - useful power out
5
Q
efficiency =
A
useful power out / total power in (x100%)
