what is the name of the force between two materials that are rubbed together?
friction
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unlike charges attract true or false?
true
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what is an electric field?
an electric field is a space around a charged particle where the particle exerts electric force on other particles
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what happens when a balloon is rubbed on a jumper?
the negative charges leave the jumper and go to the balloon
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how do batteries work in circuits?
batteries power the circuit
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what is a battery called in a circuit?
a cell
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how do you get a battery in a circuit?
when two or more cells are together it becomes a battery
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materials that have a low resistance to electric current are called...
...electric conductors
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materials that have a high resistance to electric current are called...
...electric insulators
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why can metals conduct electricity?
an electric current is a flow of charge. for materials to be able to conduct, they must be able to transfer a change when a potential difference is applied across them
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what is a series circuit?
in a simple series circuit everything is connected in one loop across the terminals of the battery
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what is a parallel circuit?
a parallel circuit is one that contains a junction
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what does an ammeter measure?
current
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the current in a series circuit is different at every point true or false?
false
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on the sides of a parallel circuit the current is half the amount of the ones on the junctions true or false?
false
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if you add more bulbs to a series circuit the bulbs get dimmer true or false?
true
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if a battery is added the current will...
...increase
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if a bulb is added the current will...
...lower
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what is the resistance in a circuit?
the resistance in a circuit is how easy or difficult it is for current to flow through it
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which metal would be better to complete the circuit, copper or iron?
copper
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what is the resistance formula?
R = V divided by I
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what is potential difference measured in?
volts
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what is current measured in?
amps
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what is resistance measured in?
ohms
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which wire has the higher resistance, thin one or thick one?
thin one
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what does the plastic coating act as?
an insulator
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which wire is the safety wire in a plug?
the earth wire
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what doe the neutral wire do?
it completes the circuit
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what does the live wire do?
it carries the current
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which type of wire has the brown insulation colour?
live
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which type of wire has the blue insulation colour?
neutral
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which type of wire has the green / yellow insulation colour?
earth
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out of steel, copper, brass, aluminium, zinc and silver which one(s) is / are magnetic
steel
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are iron, nickel and cobalt magnetic?
yes
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what are the poles on a magnet called?
north and south poles
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true or false the south pole is seeking the north pole
false
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unlike poles attract each other true or false?
true
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the magnetic field lines always point from the south pole of the magnet to the north pole true of false?
false
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the closer together the magnetic field line are the stronger the magnetic field true or false?
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