Electrical Power
The instantaneous electrical power P delivered to a component is given by
where
- P(t) is the instantaneous power, measured in watts (joules per second)
- V(t) is the potential difference (or voltage drop) across the component, measured in volts
- I(t) is the current through it, measured in amperes
If the component is a resistor with time-invariant voltage to current ratio, then:
where
is the resistance, measured in ohms.
Read more about this topic: Power (physics)
Famous quotes containing the words electrical and/or power:
“Few speeches which have produced an electrical effect on an audience can bear the colourless photography of a printed record.”
—Archibald Philip Primrose, 5th Earl Rosebery (18471929)
“Cruelty is a mystery, and the waste of pain. But if we describe a word to compass these things, a world that is a long, brute game, then we bump against another mystery: the inrush of power and delight, the canary that sings on the skull.”
—Annie Dillard (b. 1945)