# VCO.SCI.4

Lesson Summary

Describe and illustrate properties of electricity.

Vocabulary

Electricity - The physical scientific processes related to the flow of electric charge.   Charge can be either positive or negative. The SI unit of electric charge is the coulomb C.

Conductor - A material that allows electricity to flow freely though it. Most metals, especially copper.

Insulator - A material that restricts the flow of electricity.  No material is a total insulator, common examples include glass and paper.

Current - The flow of electric charge.  The SI unit for measuring current is the ampere. Ampere, A,  is defined as the flow of charge across a surface at a rate of one coulomb per second.

Voltage  - The electrical potential difference between two points, denoted by a V. A single AA battery holds 1.5V

Resistor - An electronic component that restricts the flow of electrical current and voltage. Measured in Ohms (Ω). R1 = Resistor, R2 = Variable Resistor, R3 = Potentiometer. Capacitor  - An electronic component that stores and discharges the flow of electrical current and voltage. Measured in Farads (f). C1 = Capacitor, C2 = Polarized Capacitor, C3 = Variable Capacitor. Circuit - A group of individual electronic components connected by conductive wires or traces which electric current can flow. The combination and order of components allow various tasks to be performed.

Exercise

The glide function on our Werkstatt uses capacitors to store and discharge the electricity associated with each note.  The higher we turn the glide potentiometer the more electricity is allowed to store and discharge.  We can hear the changes in how slow or fast our signal changes pitch.

If we match the settings in Figure 1 and power down our Werkstatt when we plug it back in we can hear the discharge of the electricity in the capacitors responsible for the glide function.

Figure 1. Glide setting

Materials Jumper Cables

Practice  Standards
Subject
Unit