(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