Science Quiz / Science Exam Semester 1 2013-14 Review Part 2

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QUIZ: Terms that will be on the exam

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DefinitionTerm
used to map the strength, shape, and direction of magnetic fields
a current that oscillates, more efficient to produce and transmit over distances but is less 'usable'
naturally occurring magnets
a set of two or more electrochemical cells
part of magnet where the magnetic field goes in/out
a separation of charges
materials whose domains tend to stay aligned
used to reverse the flow of current so that the armature can continuously rotate
for most conductors, the current is proportional to the voltage
an electrochemical cell in which the electrolyte is a liquid
a device that converts stored chemical energy into electrical energy
an electrochemical cell in which the electrolyte is a chemical paste
source of zero potential, large enough to absorb the potential of something else and still remain at zero
a current that is steady, less efficient to produce and transmit over distances but is more 'usable'
the rate at which energy is converted from one form to another
the loss of static electricity
a 3D region around a magnet where a magnetic force can be produced
a field around a charged particle that exerts a force on another charged particle
a liquid that conducts electricity because it contains ions
a simple mechanical device for detecting the presence of an electric charge (or field)
regions of trapped particles, 1k 25k km above Earth's surface in space
the energy associated with electric currents
the difference in direction between the magnetic pole and the geographic pole
DefinitionTerm
a fundamental property of matter associated with protons and electrons
the two metals in an electrochemical cell
the process of generating an electric current from the motion of a conductor through a magnetic field
usually a wire, carries a current, neglible 'R'
a resource that can be replaced at a similar rate to that which it is used at
a device that measures the amount of current, very low resistance, used in series with the rest of the circuit
discovered electromagnetic induction
a device that measures the drop in potential between two points in a circuit, very high resistance, used in parallel with the rest of the circuit
used to indicate electric current, ammeters and voltmeters are specialized ones of these
a cluster of magnetically aligned atoms
opposition to the flow of charges through a material
any device that consumes voltage, causes a drop in potential (or 'load')
materials with low resistance
the amount of potential energy per unit of electric charge
the multi-loop iron core assembly of a motor
selected points that are part of the data (on the line) but between graphed (measured) data points
recognised the phenomenon of chemical energy converting to electrical energy as a reaction between the two different metals of Galvani's instruments
stops/starts the flow of current, 'open' = no current, 'closed' = current flows.
the movement of electrons by polarization onto/off of a neutral object due to the electric field of a nearby charged object
materials with high resistance
a resource that exists in a fixed, limited amount
a polarized object
selected points that are part of the pattern (on the line) but beyond the graphed (measured) data points
DefinitionTerm
atmospheric glowing caused by trapped particles near the poles
constantly bombards Earth with high-energy charged particles
refers to the properties of magnets and magnetic fields
the flow of electrons through a material
states that charges are never created or destroyed; they are only transferred from one location to another
a mineral containing a lot of iron
a material whose domains can be forced to align by a nearby magnetic
giving up excess charge to something of a much larger capacity
converts mechanical energy to electrical energy
the flow of charges through a material
a device that uses electric current to continuously rotate an axle. electric to mechanical.
accidentally discovered the phenomenon of chemical energy converting to electrical energy
a path through which electric charges can flow
the part of the electrode that is connected to a circuit
chemical source of direct current, source of constant current at a constant voltage, source of potential difference in a circuit, more than one together = 'battery'
coal, oil, natural gas (and petrol & diesel)
the energy associated with motion
the build-up of electric charge on an object
metals whose domains quickly lose their alignment without external influence
called a rheostat, can change the amount of resistance
the difference in electric potential between 2 positions
the region of Earth's magnetic field in space

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