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.ohms-law-overall-graphOne 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.