How slope of a voltage-current graph relates to resistance

Ohm’s law graph is a plot of voltage and current where the voltage is plotted on the x-axis and current is plotted across the y-axis. In our experiment on 1 k resistor, we observed a straight linear relationship between Ohm’s law. Today you’ll learn the behavior of slop with the resistance.

Let’s check the Ohm’s law plot for different resistors.One can easily understand that increase of resistance decreases the slope of the graph.

The maximum height of slope actually represents the current.

Slope For 1 kΩ resistor

The current at 9 V can be calculated by using the formula:

I = V/R = 9V / 1k = 9 mA

The slope of 47 kΩ resistor

In case of 47 k resistor the current is:

I = V/R = 9V/47 k = 0.19 mA

From above two cases, one can easily understand that why slope decreases with the increase of resistance.

Also, read:

Ohm’s law triangle: A visual relationship of Ohmic formulas which make it easier to

Ohm’s law wheel: A circular wheel with 12 different formulas for calculating voltage, current, resistance, and power.