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Transcript
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…