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Ohm's law: I=V/R
See, I dont know how to use Ohm's law
For number one, I=0.5 and V=100
so you just back substitute the numbers in: (0.5)=100/R Next you isolate R. 0.5R=100 R=200
ok, so, .5 A=100V/X?
no. A is a unit.
It's not a variable. If it helps you, use Amps instead of A
Ok, I don't get this can you walk me through it?
Okay. We know that I=V/R. We also know that I=0.5Amps and V=100Volts Do you follow?
What do the things in I=V/r mean?
It's a relationship between current, voltage, and resistance. I is a variable that represents current. V is a variable that represents voltage. R is a variable that represents resistance. We usually give these measurements in Amperes (A), Volts (V) and Ohms (omega), respectively.
ok, so its really C=V/R?
We don't use C for current. We use I. This is out of habit, so use I okay?
(In mathematics we often encounter constants and we represent them with C's. If we used C for current it would be confused with other values and would not be clear). BUt essentially yes, the relationship is I=V/R
now where do i go from there?
Multiply both sides by R.
ok, so divide by .5?
Can you do number 2?
What is the electric power used by an appliance if the current is 2 A and the voltage is 50 volts? I=V/r 2=50/r 2r=50 r=100?
btw, the units for the resistance are in ohms.
no, power is P=IV x.x
sorry they are different formulas.
What is the electric power used by an appliance if the current is 2 A and the voltage is 50 volts? P=I*V? P=2A*50V P=100?
Do you need help with the rest?