Current Electricity Basics
The unit of measure for electrical energy
What are joules
The type of circuit that has multiple branches for electrons to flow
What is a Parallel Circuit
Power used x Time x Cost (what is this equation)
What is Cost to Operate
The ability of a material to oppose the flow of electrons.
What is Resistance (R)
The unit of measure for potential difference
What are Volts
The continuous flow of electrons through a conductor
What is Current Electricity
Draw the circuit symbols for a light bulb, a 3 cell battery, and a closed switch
Show me your drawing
A sticker found on devices that meet a minimum level of efficiency.
A device that reduces the flow of electric current, is used in dimmer switches, and its circuit symbol is a zig zag.
What is a Resistor
The type of circuit where current is split between the different paths.
What is a Parallel Circuit
A type of electric cell that can be recharged
What is a secondary cell
The part of a simple circuit that transforms electrical energy into other useable forms like light, heat, motion, etc.
What is a load
The name of a label found on household appliances that shows the energy usage of the device in KWh per year. (the lower the number the better)
What is an EnerGuide Label
The device that measures electric CURRENT.
What is an ammeter
A load has 12A of current flowing through it. The potential difference across the load is 60V. Calculate the resistance of the load.
5ohms
The type of current electricity that flows in one direction and is produced by an electric cell. (Remember there are 2 types)
What is Direct Current
The type of circuit where if a light becomes burnt out or broken the current won't flow (so the rest of the bulbs will also go out)
What is a series circuit
A light bulb uses 120J of energy and produces 30J of light energy. Calculate the % efficiency of this toaster.
25%
The two measuring devices that must be placed in parallel in a circuit.
What is a voltmeter and an Ohmmeter
A toaster has a resistance of 520Ī© and a current of 0.25A. calculate the potential difference across the resistor.
130V
Something that converts MECHANICAL energy into ELECTRICAL energy to be delivered to your homes via transmission lines.
What is an Electric Generating Station
Draw a circuit with a 2 cell battery, 2 light bulbs in series, an ammeter, and an open switch.
Show me your drawing
Calculate the cost of using a 2000W hair dryer for 1 hour a day for a week. The cost of electricity is 11c/KWh.
$1.54
List the 4 factors that affect resistance.
Type of material, Cross sectional area, length, temperature
A series circuit contains 4 identical lamps. The potential difference of the battery is 80V. What is the potential difference across each lamp
20V