What is ohm's law?

  What is Ohms law? 

The relationship between Voltage, Current and Resistance in any DC electrical circuit
was explained by the German physicist Georg Ohm, (1787 - 1854). Georg Ohm found that, at
a constant temperature, the electrical current flowing through a fixed linear resistance is
directly proportional to the voltage applied across it, and also inversely proportional to the
resistance.
Statement:
It states that the current ‘I’ flowing in a circuit is directly proportional to the applied
voltage ‘V’ and inversely proportional to the resistance ‘R’, provided the temperature remains
constant.
Thus, I α V
                      V
Current ∶ I = ____
                       R

 Voltage ∶ V = I. R

                                V
Resistance ∶ R = _____
                                 I

According to Ohm′
s Law ∶
 Power ∶ P = Voltage x Current
 P = V x I ------- (1)
 Subsitute, V = I. R in equation (1)
 P = I. R x I
 P = I 2R
                         V
Substitue, I = ___ in equation (1)
                         R

P = V. V
     _____
        R
P = V2
     ____
       R
According to Ohm′
s Law ∶
 Energy ∶ E = Voltage x Current x Time
 E = V x I x t ------- (1)
 Subsitute, V = I. R in equation (1)
 E = I. R x I x t
 E = I 2R t
                          V
Substitue, I = ____ in equation (1) 
                           R


           V
E = V. ___.t
            R

       V2t
E = _____
          R