ESE 121 Lecture Notes - Lecture 12: Electrical Network, Electric Light, Inert Gas
21 Mar 2017
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=(cid:1858: as you heat an object up, it emits light. The higher the temperature the brighter the light. The brighter the light, the higher the frequency and shorter the wavelength based on this formula: where c is the speed of light (3*10 m/s) and f is the frequency. Circuit requirements: we"ve seen that without an energy source the charge carriers will diffuse into an even distribution and current will quickly stop flowing. If there isn"t an electric potential difference across both ends of the circuit, the bulb will not light. In the previous figure, the energy source was a battery, but in household circuits the energy is supplied by some local utility. Electrical power: we use electrical circuits to perform functions for us, such as lighting a dark room. Power = work/time: electrical power is the rate at which electrical energy is consumed by the load. Power = energy consumed by load/time (cid:2197)(cid:2187)(cid:2200)=(cid:2197)(cid:2200) (cid:2186)(cid:2197)(cid:2196)(cid:2187) (cid:2198)(cid:2187)(cid:2200) (cid:2203)(cid:2196)(cid:2202) (cid:2202)(cid:2195)(cid:2187)=(cid:2178)(cid:2199)(cid:2202)
