PHYS 102 Lecture Notes - Lecture 7: Electrical Network, Electric Current, Electric Potential
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PHYS 102 Full Course Notes
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18. 5 electric power: electric energy is transformed into thermal energy or light in such devices, and there are many collisions between the moving electrons and the atoms of the wire. 2: the rate of energy transformation in a resistance r can be written in two other ways, starting with the general relation p = iv and substituting in v = ir: 18. 6 power in household circuits: electric wires that carry electricity to lights and other electric appliances have some resistance, although quite small. If current is large enough, the wire will heat up and produce thermal energy at a rate equal to. V = v0sin2 ft = v0sinwt: the potential v oscillates between +vo and vo, and vo is referred to as the peak voltage, the frequency f is the number of complete oscillations made per second, and w = 2 f. If a voltage v exists across a resistance r, then the current i through the resistance is:
