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Electronics Revision Part 2
A diode
A resistor at constant temperature
A filament lamp
A resistor at constant temperature
A diode
A filament lamp
A filament lamp
A resistor at constant temperature
A diode
A diode
A filament lamp
A resistor at constant temperature
The resistance of a light-dependent
decreases as
resistor (LDR) ________
light intensity increases.
The resistance of a thermistor
decreases as the temperature
_________
increases
The greater the resistance the
Current
smaller the _______
For components connected in
series the total resistance is
_____
the sum of the resistance of
each component
For components connected in
parallel
_____ the total current through
the whole circuit is the sum of
the currents through the
separate components.
For components connected in
series there is the same current
_____
through each component
For components connected in
parallel
_____ the potential difference
across each component is the
same.
For components connected in
series the total potential
_____
difference of the supply is
shared between the components.
Cells and batteries supply
current which always passes in
the same direction. This is called
Direct ______.
Current
______
Alternating current is one
An ________
which is constantly changing
direction.
In the UK it has a frequency of
50
50 hertz).
__ cycles per second (__
When the current in a fuse wire
exceeds the rating of the fuse it
melt breaking the circuit.
will ____,
earth wire and fuse
The ____
together protect the appliance
and the user.
When an electrical charge flows
through a resistor, electrical
energy is transformed into heat
___
energy.
4 How does the earth wire and
fuse together protect you from
danger or electrocution?
3 Where does the earth wire
connect in a metal cased device?
(Diagram)
2 What are the three ratings of
fuse?
1 The 3 pin plug – diagram with
parts labelled correctly