Playing electrical is an awesomeness, it is a joy that never stops, and today, for a reason or another, I thought of measuring the resistance of:
Time for Aperture Science!!!
In the picture above, I have connected a 12v source to an Ammeter (Black multimeter on left side) and then to two alligator clips which you see in the middle of the screen in green and white
A second multimeter (green) connects to a Thermocouple to measure temperature (you can see a white wire with little black at the end going between the two alligator clips, the temperature is now 22 deg C as you see in the picture
Pencil leads are made of graphite, which is a carbon material, it is a semimetallic material and hence has low resistance, as it heats up with the current, it burns out and its resiatance increases till the graphite is conaumed
Yea, pencil lead
The reading varied from one piece to another, but the important thing is that the range was 1.5-3 Ohm, which means
IT IS TIME FOR FUN
MUWAHAHAHAHA
You ask why I say this?
well, Ohm's law says that the less resistance you have, the more current will flow, in other words
I = V/R
I: Electrical Current in Ampere
V: Voltage in volts
R: Resistance in Ohm
In the picture above, I have connected a 12v source to an Ammeter (Black multimeter on left side) and then to two alligator clips which you see in the middle of the screen in green and white
A second multimeter (green) connects to a Thermocouple to measure temperature (you can see a white wire with little black at the end going between the two alligator clips, the temperature is now 22 deg C as you see in the picture
And then, I turn on the 12v supply
Pencil leads are made of graphite, which is a carbon material, it is a semimetallic material and hence has low resistance, as it heats up with the current, it burns out and its resiatance increases till the graphite is conaumed
