(AD) Aviation Machinist Mate Week 2 Latest Update Graded A+

Electricity The physical phenomena arising from the existence and interaction of an electrical charge Voltage / Electromotive Force (EMF) The amount of force being applied to a circuit to produce an electron flow Amperage / Current Flow The quantity of electricity flowing through the circuit Resistance The opposition to the flow of electrons offered by a device or material Ohms The measurement of resistance to current flow Watt The measurement of electrical work done Forms of Electricity Static and DynamicStatic Electricity (1) Electricity at rest (2) Begins with a build up of either a positive or negative electron charge. If two negative charges or two positive charges are brought close together, the objects that hold that charge repel each other. If a positive charge is brought within close proximity of a negative charge, the two objects attract each other (3) Static electricity is produced by friction and is not easily measured nor is it controllable or usable Dynamic Electricity A practical form of current flow that is used in everyday life. This form of electricity is easily produced, measured, and controlled Methods of Producing Dynamic Electricity Mechanical, Chemical, Thermal, and Pressure Mechanical Produced by rotating a magnetic field through another magnetic field Ex: A Grass CutterChemical Produced by surrounding two or metallic plates with a chemical electrolyte Ex: A Battery Thermal Produced by joining two dissimilar metals and applying heat Ex: Thermocouple Pressure Produced by applying pressure to quartz, which will produce an electron flow Ex: A Watch Types of Electricity AC and DC Direct Current (DC) Current that is a steady flow in one direction only. It is produced mechanically by a DC generator, or chemically by a battery Ex: A Flashlig