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AQA Physics P2.3
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Are electrons negatively or positively charged?
Negatively
What causes some insulating materials to become electrically charged when they are rubbed together?
Electrons are rubbed off one material and onto the other
What happens when two electrically charged objects (that have the same charge) are brought together?
They repel each other
Give an example of a type of material that electrical charges can move through easily
Metals
What is electric current?
A flow of electric charge
What is the unit of electrical current?
Ampere (Amp) (A)
How is the size of a current (I) calculated from the total charge (Q) and time (t)?
I = Q/t
What is the standard unit of electrical charge?
Coulomb (C)
What is
potential difference
another name for ?
Voltage
What is this the symbol for?
Switch (open)
What is this the symbol for ?
Switch (closed)
What is the symbol for a fuse?
What is the symbol for a cell ?
What is the symbol for a battery ?
What is this the symbol for ?
Diode
What is this the symbol for ?
Variable resistor
What is this the symbol for ?
Resistor
What is this the symbol for ?
Light Emitting Diode (LED)
What is this the symbol for ?
Light Dependent Resistor (LDR)
What is this the symbol for ?
Thermistor
What is this the symbol for ?
Lamp
What is the symbol for a voltmeter?
What is the symbol for an ammeter?
What component is this graph for?
Resistor
What is the unit of resistance?
Ohm
If a component has a larger resistance, will the current be larger or smaller?
Smaller
In a series circuit, what do you know about the current at different points?
It is always the same
In a series circuit how is the total resistance calculated?
By adding up the individual resistances
For components connected in parallel what do you know about the potential difference across each component?
They are all the same
What component is this graph for?
Filament bulb
Which component only allows current to flow one way?
Diode
What component is this graph for?
Diode
What happens to the resistance of an LDR as light intensity increases?
The resistance decreases
What happens to the resistance of a thermistor as temperature increases?
The resistance decreases
Which component emits light when a current flows through it in a forward direction?
Light Emitting Diode (LED)
Author
BMH
ID
298329
Card Set
AQA Physics P2.3
Description
AQA Physics P2.3
Updated
2015-03-13T18:05:56Z
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