Electricity Chapter 12
Card Set Information
Electricity Chapter 12
Electricity glossary terms
Direct Current (DC)
Current from a cell in which charged particles move from the negative terminal to the positive one.
Alternating Current (AC)
Moving a magnet in and out of a coil of wire generates a current in the coil
The current moves one way when a pole of the magnet is inserted into the coil and the opposite direction when the magnet is removed from the coil
Electrons moving back and forth with no net direction
A simple electrical device that can change the potential difference of an AC
Do not work with DC
Can reduce the V of increase the V
A safety device that is put in series with other circuits that lead to appliances and outlets
A safety device in older buildings/ appliances; like a circuit breaker, it is placed in series with other circuits and leads to appliances and outlets.
The rate at which a device uses electrical energy.
The measurement for electrical power.
The energy that is used by a device at a given setting.
Measurement for electrical energy.
A label that gives details about how much energy in an appliance is used over one year of normal use.
A meter that records the total amount of electrical energy used hour by hour
Automatically sends info to utility companies
Time of Use Pricing
A system of pricing in which the cost of each KWh energy used is different at different times in a day.
The electrical energy that is consumed while a device is not turned on
Best way to prevent it is to unplug the device
The ratio of useful energy output to total energy input
Energy input id the power multiplied by time appliance is on
The continuous minimum demand for electrical power
Ontario = 12 000W
In Ontario is is primarily generated using hydroelectric and nuclear power
The production of electricity using a source of running water.
A demand for electricity higher than the base load
Met by burning coal and natural gasses
The greatest demand for electricity.
Renewable Energy Source
Energy that can be renewed in a relatively short amount of time
Eg. hydroelectrical power
Non-Renewable Energy Source
Energy that cannot be renewed as quickly
Eg. fossil fuels
Positives - renewable, environmentally friendly, at 100% efficiency 1 m
can supply power for most electrical appliances
Negatives - most only work at 25% efficiency, not concentrated, high cost, require sunlight which isn't always present
The generation of a DC when certain materials are exposed to light.
Positives - only returns as much carbon to the atmosphere as was originally in the organism (neutral), results in less acid rain, no heavy metals emitted, renewable
Negatives - resources to burn aren't very available