4B.5 Power in electric circiuts Flashcards
1
Q
what is the equation for the wokr done in an electrical circut
A
1= V x I x t
2
Q
what is power
A
the rate of energy transfer
3
Q
what is the equation for Power
A
power = IV
4
Q
what are the two variations of the power equations
A
Power = I^2R Power = V^2/R
5
Q
what does efficiency mean
A
the ability for a machine to transfer work usefully
6
Q
what des efficiency equal to
A
usefull work done/ total energy input or usefull power output/ total power input
