If you know the power rating of an appliance and the voltage of the line it is attached to, you can calculate the current the appliance uses by
A. multiplying the voltage by the power.
B. subtracting the power from the voltage.
C. dividing the voltage by the power.
D. dividing the power by the voltage.
I'm not sure how I can explain without giving the direct answer but since this posted a long time ago and you should've looked at the post above, this is dividing the voltage by the power :) Let me know if you want more information on this topic, I'll help!
You'll find your answer here:
http://energy.gov/energysaver/estimating-appliance-and-home-electronic-energy-use
really i cant tell ???
The correct answer is option D. To calculate the current the appliance uses, you need to divide the power rating of the appliance by the voltage of the line it is attached to.
This can be explained using Ohm's Law. Ohm's Law states that the current flowing through a conductor is directly proportional to the voltage applied across it, and inversely proportional to its resistance. In this case, the power rating of the appliance represents the amount of power it consumes, and the voltage represents the potential difference or pressure of the electrical energy supplied to the appliance.
The formula to calculate the current is as follows:
Current (I) = Power (P) / Voltage (V)
By dividing the power by the voltage, you are able to determine the current flowing through the appliance.