Terms to Remember - Electricity and Heat PDF

TERMS TO REMEMBER Three essential elements in electric circuit READ,UNDERSTAND AND MEMORIZE THE Current FOLLOWING TERMS Resistance HEAT AND TEMP...

TERMS TO REMEMBER Three essential elements in electric circuit READ,UNDERSTAND AND MEMORIZE THE Current FOLLOWING TERMS Resistance HEAT AND TEMPERATURE Voltage or potential difference Heat is a form of energy that is transferred CURRENT from objects with higher temperatures to objects with lower temperatures. It is the movement or flow of electrical Thermal energy is the total amount of charge and is measured in Amperes, energy of all the molecular motion inside symbol I. an object. It is the kinetic energy of moving Amount of charge passing through any particles of matter. or specific point in a conductor per unit Kinetic Molecular Theory, the hotter the time. substance, the faster the molecules move. Movement of electrons along a Temperature is a measure of how hot or conductor cold an object is. SI unit: ampere (I) Unit is named after French scientist TYPES OF HEAT TRANSFER and mathematician Andre Marie Conduction Convection Radiation Ampere. 1A= 1Coulomb/second Energy Occurs in gases Energy transferred transferred by and liquids by electromagnetic VOLTAGE direct contact waves (visible light, Movement of microwaves, It is the “push” to the charges in the circuit. Energy flows large number of infrared) directly from particles in SI unit: volt (V) warmer to cooler same direction All objects radiate objects energy Cycle occurs Continues until while Can transfer energy object temperature through empty RESISTANCE temperatures differences exist space are equal Property of a material to resist the flow of electrons SI unit: ohms- named after Georg Simon Ohm BASIC ELECTRICITY Ω (SYMBOL FOR OHM) Electricity is a form of energy based on the flow of THE RELATIONSHIP OF CURRENT TO VOLTAGE charged particles, usually electrons, through a AND RESISTANCE IN AN ELECTRIC CIRCUIT medium. 1. Current is directly proportional to voltage TWO TYPES OF ELECTRICITY and inversely proportional to resistance. 2. The higher the voltage, the greater is the current. 3. The greater the resistance, the lesser is the current Ohm's law states that the voltage or potential difference between two points is directly proportional to the current or electricity passing through the resistance, and directly proportional to the resistance of the circuit. The formula for Ohm's law is V=IR. WHAT IS AN ELECTRIC CIRCUIT? ELECTRIC CIRCUIT is a closed conducting path where charges flow.