How to convert ohms to watts?

How do you convert ohms to watts?

• Answer:

  You are misunderstanding what watts and amperes mean, so you need more information. Watts are units of power, in the sense of work done in a certain amount of time. Amperes are units of charge flow, as in the number of coulombs (1 coulomb = 6.24318005 x 10^18 electrons) flowing through some point per second. In simplest terms, the power, in watts, is related to current, in amperes, by either the resistance of the circuit component or the electrical potential. For example, if you have 1A flowing through a 1Ω resistor, then you have 1W of power being dissipated in that component. Generally, the relationship between power, current and voltage is as follows: P=VIP=VIP = VI Note that 1W=1J1s1W=1J1s1W = \frac{1 J}{1 s}, 1V=1J1C1V=1J1C1V = \frac{1 J}{1 C} and 1A=1C1s1A=1C1s1A = \frac{1 C}{1 s}.  You can see for yourself that the dimensional analysis works out very clearly. Further, note that, from Ohm's law, V=IRV=IRV = IR, so you can write P=IV=I2R=V2RP=IV=I2R=V2RP = IV = I^2R = \frac{V^2}{R}