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| V*C = I*t |
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| bostonman:
Someone used this formula and I don't understand how the units equal. V*C = I*t The SI units (from what I found are): Volt = kg·m2·s−3·A−1 Coulomb = A * s I = A t = s What am I missing in the SI units that is not allowing both sides to equal each other? |
| T3sl4co1l:
kg.m^2/s^3 == W == V.A ;) Handy to remember that capacitance is F == s/Ω, and inductance is H == Ω.S. :) Tim |
| ebastler:
The “C” in your formula does not stand for Coulomb (which is a unit), but for capacity (which is a quantity, and its unit is Coulomb/Volt). The „V“ stands for voltage, but its unit happens to be Volt, so that part is ok. :-) |
| TimFox:
Incidentally, when writing equations carefully, one should put the variable "voltage" V in italics, and the unit "volts" V in roman. Similarly, italic C is the variable "capacitance" and roman C is the unit "coulombs". |
| Nominal Animal:
Dimensional analysis, my favourite! I like to write the units in angle brackets, thus: V [ V ] · C [ C / V ] = I [ A ] · t [ s ] For dimensional analysis, just write the units: [ V ] · [ C / V ] = [ A ] · [ s ] which is equivalent to [ C ] = [ A s ] which is true, 1 C = 1 A s. |
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