Friday, 27 June 2014 14:44

## K5-34: THERMAL COEFFICIENT OF RESISTANCE IN COPPER

• ID Code: K5-34
• Purpose: Show that the resistance of copper changes linearly with temperature.
• Description: Measure the resistance of the copper coil at room temperature (295K), at the temperature of a dry ice and methanol mixture (195K), and at the temperature of liquid nitrogen (77K). Plot resistance versus temperature to demonstrate the linearity.
• Loc codes: K5, I0, ME2
• #### K5-01: PIEZOELECTRICITY

Demonstration of a piezoelectric crystal Read More
• #### K5-02: PIEZOELECTRIC CRYSTAL - AUDIBLE

Demonstrate that a piezoelectric crystal converts electrical impulses into physical vibrations Read More
• #### K5-03: PIEZOELECTRIC IGNITOR

Show a commercial use for piezoelectricity Read More
• #### K5-04: PIEZOELECTRIC GUN

Application of piezoelectricity to produce copious quantities of electric charge Read More
• #### K5-11: BATTERY MODEL

Simple model of a battery using a human as the source of energy Read More
• #### K5-12 BATTERY AND CURRENT - WORKING MODEL

Model of battery with circuit attached Read More
• #### K5-13: ELECTRIC CURRENT - MODEL

Indicate how electrons really flow through a conductor Read More
• #### K5-14: ELECTRIC CELL

Demonstrate how an electric cell is formed Read More
• #### K5-16: CARRIER CURRENT DENSITY MODEL

Model the density of carriers crossing a plane Read More
• #### K5-21: AC PLUG CIRCUIT CHECKER

Check the wiring of 110VAC power sockets Read More
• #### K5-22: AC PLUG CIRCUIT CHECKER CHECKER

Demonstrate each different kind of wiring error Read More
• #### K5-23: ROTATING TWO-COLOR LED

Demonstrate that what comes out of a 110 VAC plug is in fact alternating current Read More
• #### K5-31 OHM'S LAW

Demonstrates relationship between current, voltage, and resistance Read More
• #### K5-32: RESISTANCE VS DIAMETER AND LENGTH

Determine how resistance varies as a function of diameter and length for the same material Read More
• #### K5-33 CONDUCTIVITY OF SALT SOLUTION

Shows that pure water is not conducting, but a solution of an electrolyte is conducting Read More
• #### K5-34: THERMAL COEFFICIENT OF RESISTANCE IN COPPER

Show that the resistance of copper changes linearly with temperature Read More
• #### K5-35: RESISTORS AT LN TEMPERATURE

Illustrate materials with both positive and negative temperature coefficients of resistivity Read More
• #### K5-36: RESISTORS AT LN TEMPERATURE - LIGHT BULB INDICATOR

Demonstrate materials with both positive and negative temperature coefficients of resistance Read More
• #### K5-41: V-I CURVES FOR OHMIC AND NON-OHMIC DEVICES

Illustrate resistive properties of resistors and diodes Read More
• #### K5-42: TRANSISTOR

Demonstrate a transistor circuit Read More
• #### K5-43: NON-OHMIC DEVICE - V VS. I

Demonstrates the non-linearity of the V vs I curve for a diode Read More
• #### K5-44: NON-OHMIC DEVICE - LIGHT BULB

Show the change in resistance of a light bulb with temperature Read More