Electricity Flashcards Chapter 12

Current in which charged particles travel through a circuit in only one direction

A current in which electrons move back and forth in a circuit

An electrical device that changes the size of the potential difference of an alternating current

A safety device that is placed in series with other circuits that lead to appliances and outlets

A safety device that is found in older buildings and some appliances; like a circuit breaker, it is placed in series with other circuits that lead to appliances and outlets

The rate at which an appliance uses electrical energy

A unit of electrical power; 1 kilowatt = 1000 W

A practical unit of electrical power; 1 kW = 1000 W

• The energy that is used by an appliance at a given setting; is determined by multiplying its power rating by the length of time it is used
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The practical unit of electrical energy

• A label that gives details about how much energy an appliance uses in one year of normal use
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A meter that records the total electrical energy used hour by hour and sends this information to the utility company automatically

A system of pricing in which the cost of each kW-h of energy used is different times of the day

• The electricity that is consumed by an appliance or device when it is turned off
• i.e.- Clock of a DVD player

The ratio of useful energy output to total energy input, expressed as a percentage

The continuous minimum demand for electrical power

The production of electricity using a source of moving water

A demand for electricity that is greater than the base load and is met by burning coal and natural gas

• A source of energy that can be replaced in a relatively brief period of time
• i.e.- Solar Energy

• A source of energy that cannot be replaced as quickly as it is used
• i.e.- Coal Burning

Energy that is directly converted from the energy of the Sun into electricity

The generation of a direct current when certain materials are exposed to light

Energy that is generated from plant and animal matter