Students will: 1. Prepare and deliver a brief summary based on research. 2. Calculate work and power. 3. Correctly use a digital multimeter as a voltmeter, ohmmeter, or ammeter. 4. Calculate electrical power developed in a circuit. 5. Calculate mechanical power developed when lifting an object. 6. Determine efficiency of a system that converts an electrical energy to a mechanical energy. 7. Calculate circuit resistance, current, and voltage using Ohm’s law, including circuits with elements in series and/or parallel. 8. Compare and contrast the behavior of electrical circuits with parallel and series circuit designs.
Key Terms
Alternative Energy Any source of energy other than fossil fuels that is used for constructive purposes. Ampere The unit of electric current in the meter-kilogram-second system of units. Referred to as amp and symbolized as A.Biomass Plant materials and animal waste used especially as a source of fuel. Current The net transfer of electric charge (electron movement along a path) per unit of time. Electrical EnergyEnergy caused by the movement of electrons.ElectricityThe flow of electrical power or charge. ElectromagneticInduction The production of electricity in conductors with the use ofmagnets. Efficiency The ratio of the useful energy delivered by a dynamic system to the energy supplied to it. Energy A fundamental entity of nature that is transferred between parts of a system in the production of physical change within the system and usually regarded as the capacity for doing work. Energy Conversion Changing one form of energy to another. Environmental Protection Agency An organization that worksto develop and enforceregulations that implement environmental laws enacted by Congress. Fossil Fuel A natural fuel such as coal or gas, formed in the geological past from the remains of living organisms. Generator Adynamo or similar machine for converting mechanical energy into electricity. Geothermal Energy The use of heat from within the Earth or from the atmosphere near oceans. Gravitational Energy The state when objects are not yet in motion.InductionThe production of an electric or magnetic state by the proximity (without contact) of an electrified or magnetized body. Inexhaustible Energy An energy source that will never run out. Kinetic Energy Energy which a body possesses by virtue of being in motion. Nonrenewable Energy A resource that cannot be replaced once used. Ohm The unit of electric resistance in the meter-kilogram-second system of units. Symbolized as Ω. Ohm’s Law States that the direct current flowing in an electric circuit is directly proportional to the voltage applied to the circuit. Parallel Circuit A closed electrical circuit in which the current is divided into two or more paths and then returns via a common path to complete the circuit. Potential Energy The energy that a piece of matter has because of its position or nature or because of the arrangement of parts. Power Converter Changes one form of power to another. Power Grid A system that links electricity produced in power stations to deliver it to where it is needed. Renewable Energy A resource that can be replaced when needed .Resistance The opposition that a device or material offers to the flow of direct current. Work A result of a force moving an object a certain distance. Turbine A machine for producing power in which a wheel or rotor is made to revolve by a fast-moving flow of water, steam, gas, or air. Power The rate at which work is performed or energy is expended. Rotor The rotating member of an electrical machine. Series CircuitA circuit in which all parts are connected end to end to provide a path of current. Volt The unit of potential difference symbolized as V. Voltage The potential difference measured in volts. The amount of work to be done to move a charge from one point to another along an electric circuit.
