Table of Contents
What is the I-V curve of a resistor?
A resistor is one of the simplest electronic devices, and thus has one of the simplest I-V curves. It is a straight line which intercepts the origin and passes through Quadrants I and III – making a resistor a passive device. The current at each voltage is proportional to the resistance following Ohm’s law: I = V / R.
What does the slope of an I-V curve represent?
Slope of a I-V graph for a linear resistor represents its resistance.
How does the slope of the line relate to resistance?
The slope of the line is the value of the resistance. A resistor is ‘non-Ohmic’ if the graph of voltage versus current is not a straight line. For example, if resistance changes as voltage changes, the graph of voltage versus current might show a curve with a changing slope.
How do you find the resistance of a VI graph?
Graph the resistance
- Choose two points on the line (point A and point B).
- Calculate the difference between the voltages at the two points (the RISE of the slope).
- Calculate the difference between the current at the two points (the RUN of the slope).
- Divide the RISE by the RUN. This is the slope of the line.
How do Iv graphs work?
Resistors and filament bulbs The shape of the I-V graph changes as the temperature of the component increases. When the component becomes hotter, the atoms in the metal lattice vibrate more. More collisions occur between the free electrons and atoms, increasing the resistance.
What is the shape of the I-V curve?
Introduction to I−V Curves As is shown in Figure 1, a standard I−V curve has the shape of a concave curve with nearly no change of current at small voltage, and a sharp decrease of current at a certain voltage point.
How do you graph resistance?
How do you find the slope of an IV graph?
- Slope of the curve=ΔVΔI=R1=Resistance1.
- Note: Reciprocal of resistance is also called conductance.
What is the resistance in VI graph?
So we can define resistance (R) as the ratio of voltage across the conductor to the value of current flowing through it. In a V I graph the slope of the curve gives us the resistance of the material.