Home
Flashcards
Preview
Edexcel P2 Unit 2.txt
Home
Get App
Take Quiz
Create
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 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
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 (lamp)
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
What happens when an electrical charge flows through a resistor?
It gets hot
Are
ammeters
connected in a circuit in series or parallel?
Series
Are
voltmeters
connected into a circuit in series or parallel?
Parallel
What is the difference between a normal resistor and a variable resistor?
The resistance of a normal resistor does not change but you can manually alter the resistance of a variable resistor
What is the unit of resistance and what is the symbol?
Ohm
What affects the resistance of an
LDR
?
Light intensity
In a bright light, does the resistance of an
LDR
increase or decrease?
Decrease
What does the resistance of a
thermistor
depend upon?
Temperature
Does the resistance of a
thermistor
increase or decrease when it gets warmer?
Decrease
What unit is used to measure
power
?
Watt (W)
What is power?
The rate at which energy is used. (How quickly it is used)
What is the unit of
energy
?
Joule (J)
Author
HLHSscience
ID
196278
Card Set
Edexcel P2 Unit 2.txt
Description
Edexcel P2-Unit 2
Updated
2013-02-02T09:14:18Z
Show Answers
Home
Flashcards
Preview