Download WORD - hrsbstaff.ednet.ns.ca

Physics 12 Assignment KEY
Electric Circuitry
Learning Outcome (Students will be able to…):
 apply Ohm’s law to series, parallel, and combination circuits
_____________________________________________________________________________
Level 1

Define all key terms on pages 688, 694, 704, 715 (except internal resistance, electromotive
force, terminal voltage) & 734
Conductor – a material, like a metal, that allows electric charges to flow easily
Insulator – a material that does not allow electric charges to flow easily
Electrostatics – the study of electrical charges at rest
Voltaic cell – a cell consisting of two different metals, called electrodes, placed in an electrolytic
solution that produces an electric charge on the electrodes
Battery – a combination of two or more voltaic cells that convert chemical energy into electrical
energy
Electrode – an electric conductor through which a current enters or leaves an electric device,
such as a voltaic cell
Electrolyte – a solution that conducts electricity between two electrodes in a voltaic cell
Anode – the positive electrode of an electrolytic cell; the negative pole of a primary cell or battery
Cathode – the negative electrode of an electrolytic cell; the positive pole of a primary cell or
battery
Potential difference – a measure of the amount of electric effort a battery or power supply can
expend to push a current through a conductor
Current – the quantity of positive charge passing a given point during a particular time interval in
the circuit, measured in amperes
Electron flow – the flow of negative charge from cathode to anode in a circuit
Elementary charge – the quantity of charge on an electron or proton, the basic unit of charge
Open circuit – a incomplete circuit, in which current is unable to flow
Closed circuit – a complete circuit, in which current is able to flow
Loads – devices in an electric circuit that receive power
Power supply – a device such as a cell, battery or generator which supplies current to a circuit
Circuit elements – parts of a circuit, such as loads and power sources
Ammeter – a device that measures the current to and from a circuit
Voltmeter – a device that measures the potential difference across a circuit element
Series – a connection in a circuit in which there is only one path for current to flow
Parallel – a connection in a circuit in which there is more than one path for the current to flow
Resistivity – the product of area and resistance of a circuit wire, divided by the length
Unit of resistance (ohm) – unit of resistance that will allow one ampere of current to move through
the resistor when a potential difference of one volt is applied across the resistor
Non-ohmic resistance – devices or materials that do not obey Ohm’s Laws
Equivalent resistance – the calculated total resistance of a group of resistors combined either in
series or parallel or both
Kilowatt-hour – the energy transformed by a power output of 1000 W for one hour

Page 747: #2, 3, 5, 8, 10, 13
Level 2

Page 749: #24, 25, 26, 28
Level 3

Page 749: #29, 33, 34
Find the current in Branch 2…