How do you calculate current when the resistor value is given in kilowatts
2007-01-29 06:29:57 · 5 answers · asked by man_fredk 1 in Science & Mathematics ➔ Engineering
The resistor value is not given in kilowatts, it is given in ohms. The watt rating on a resistor is used to determine the amount of power that the resistor can safely handle. This power is equal to P=V^2/R=I^2*R, where V is voltage, I is current, and R is resistance (in ohms). To determine current from voltage and resistance, the current (in amps) is equal to the voltage (in volts) divided by the resistance (in ohms), or I=V/R.
2007-01-29 07:41:05 · answer #1 · answered by deken_99 2 · 0⤊ 0⤋
I = V / R
Current is voltage divided by resistance.
A resistor is measured in OHMs (resistance). A kilowatt rating is the maximum wattage it can take before burning out, but that's not used in the calculation of current.
2007-01-29 06:33:59 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Resistor values are not in kilowatts, but their power rating is in watts (or, for something really big, KW). Has to do with the ability of the resistor to dissipate the heat generated by the IR loss through it. Don't confuse the power rating with the resistance.
2007-02-01 19:44:38 · answer #3 · answered by ZORCH 6 · 0⤊ 0⤋
Resistors have uniits of Ohms and not watts or kilowatts.
If you know the voltage and the rsistance; I = V/R ..
If you have a power (P) in watts ; I = P/V
2007-01-29 06:34:57 · answer #4 · answered by Gene 7 · 0⤊ 0⤋
Resistance isn't measured in wattage; it is measured in ohms. Watts degree power. additionally, the configuration concerns. it would count number on no count if the resistors have been in series or parallel.
2016-12-13 03:41:15 · answer #5 · answered by ? 4 · 0⤊ 0⤋