Ohm's law & Kirchoff's law

Ohm's lawThe current flow through a Resistance there must be a voltage across that resistance. Ohm's law shows the relationship between the voltage current  and resistance.

V=I X R, I=V/R, R=V/I
 - When a larger light bulb(consumer) uses in a circuit the current increases more than using a small light bulb and if the larger current flows through the circuit the resistance decreases.

Kirchoff's law
The sum of all the voltage drop around the loop equal zero.This idea by Kirchoff is known as the Conservation of Energy.

Vs=Vr+Vd=0