Resistance

K6-52: IMPEDANCE MATCHING - BATTERY AND JOULEMETER

Purpose: Demonstrate that the power transmission is maximized when the source impedance and the load impedance are equal.

K6-35: VOLTAGE DIVIDER

Purpose: Show how a voltage divider can be used to produce any voltage up to the maximum of the source.

K6-33: WHEATSTONE BRIDGE

Purpose: Demonstrate operation of a Wheatstone bridge.

K6-32: POTENTIOMETER

Purpose: Find an unknown EMF using a voltage divider.

K6-22: ENERGY CONVERSION - IMMERSION HEATER

Purpose: Demonstrate quantitatively the conversion of electrical energy into heat.

K6-21: HEATING IN CURRENT-CARRYING WIRE

Purpose: Show the conversion of electrical energy into heat.

K5-45: SEMICONDUCTOR MODEL

Purpose: Model of semiconductor.

K5-44: NON-OHMIC DEVICE - LIGHT BULB

Purpose: Show the change in resistance of a light bulb with temperature.

K5-41: V-I CURVES FOR OHMIC AND NON-OHMIC DEVICES

Purpose: Illustrate resistive properties of resistors and diodes.

K5-34: THERMAL COEFFICIENT OF RESISTANCE IN COPPER

Purpose: Show that the resistance of copper changes linearly with temperature.

K5-36: RESISTORS AT LN TEMPERATURE - LIGHT BULB INDICATOR

Purpose: Demonstrate materials with both positive and negative temperature coefficients of resistance.

K5-32: RESISTANCE VS DIAMETER AND LENGTH

Purpose: Determine how resistance varies as a function of diameter and length for the same material.

K5-35: RESISTORS AT LN TEMPERATURE

Purpose: Illustrate materials with both positive and negative temperature coefficients of resistivity.

K5-13: ELECTRIC CURRENT - MODEL

Purpose: Indicate how electrons really flow through a conductor.

J7-12: CURIE POINT OF IRON

Purpose: Show the Curie point of iron.

I7-21: SUPERCONDUCTOR - MAGNET LEVITATION

Purpose: Demonstrate levitation of a magnet above a high-temperature superconductor

K5-43: NON-OHMIC DEVICE - V VS. I

Purpose: Demonstrates the non-linearity of the V vs I curve for a diode

K5-33 CONDUCTIVITY OF SALT SOLUTION

Purpose: Shows that pure water is not conducting, but a solution of an electrolyte is conducting

K5-31 OHM'S LAW

Purpose: Demonstrates relationship between current, voltage, and resistance

K4-07 BICYCLE GENERATOR

Purpose: Demonstrates a 110 VAC magnetoelectric generator, and the relationship of work to power output
• 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