(a) Express ohm’s law by a mathematical formula.

(b) Draw a circuit diagram to verify ohm’s law.


(c) Present the relationship between the voltage applied across a conductor and the current flowing through it graphically.

a) Mathematically, Ohm’s law is given by


V=IR


Where v is the potential difference, I is the current and R is the resistance


b)



This circuit diagram explains Ohm’s Law.


c) The potential difference across a conductor is proportional to the current through the resistor.


V I


V=IR


This is similar to the equation of a straight line passing through the origin.


So the graph between voltage and current is a straight line with a slope of R.



Fig. Graph of I vs V


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