How to use Ohm's Law

How to use Ohm's Law(The basic electronic must know Law and equations)

Instructions

Step1 KEY:
V=Voltage (measured in volts)
I=Current (measured in ampheres)
R=Resistance (measured in ohms)
P=Power (measured in watts)

Step2 Voltage can be calculated by any of the three following equations:
1) I*R
2) P/I
3) (P*R)^1/2

Step3 Current can be calculated by any of these equations:
1) V/R
2) P/V
3) (P/R)^1/2

Step4 Power can be determined by the following:
1) V*I
2) I^2*R
3) V^2/R

Step5 Finally, resistance can be determined using these equations:
1) V/I
2) P/I^2
3) V^2/P