Question

What Type of Graph do I Expect from Question 6 and also Help in answering the Discussion Question.

Method C: The semiconductor (Diode) Worksheet 18-3: Semiconductor Forward Curreny 1 (Amps) V(volts) Reversed Connections I (Amps) V (volts) 6. Plot a graph of V versus I for the semiconductor Comment on your graph. Is Ohm's law verified/obeyed? 7. Discussions Discuss the sources of error in the measurements of resistances. Is this the most accurate way of measuring resistance? If not, what would you use and why?

This was the Experiment. it was Verifying Ohms Law

I just need a Rough Sketch of How the Graph will be

Answer 1

A Diode does not obey Ohm's law, as relationship between V-I is not linear. Current is almost zero in reverse connections.

V-I characteristic graph of a diode is as follows

For metal experiment, V-I graph will be a straight line passing through origin.

Forward bias 0.7 V

For diode, at a given instant you can only measure a local resistance or dynamic resistance i.e. change in voltage /change in current.

For metal resistance, Practical voltmeter draw some current due to its internal resistance which introduce error in the resistance measurement.

Wheatstone bridge or zero current method is best to mesure resistance.