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How
can a plastic ruler be given an
1
electric charge?
answer
•By rubbing it.
•This causes charges to build
up on the ruler.
2
Name a particle responsible
for charge?
answer
Electrons –
particles in an atom
tiny negative
3
What happens to an atom
when it becomes negatively
charged?
answer
It gains electrons
4
What happens to an atom
when it becomes positively
charged?
answer
It loses electrons
5 What
is build up of charge on
an object’s surface called?
answer
Static electricity
6
What is moving charge
called?
current
answer
7
Why are component
symbols used in circuit
diagrams?
answer
Easier to draw and
understand
8
Name the parts of the atom
answer
Electron
Nucleus
(protons and neutrons)
9
Complete the table?
answer
Particle Name Charge
Location
Proton
Positive
Nucleus
Electron
Negative
Outside nucleus
Neutron
Neutral
Nucleus
Electrical Symbol Name of electrical
10
component
Cell
Battery
Ammeter
answer
Variable resistor
Bulb
Lead
Voltmeter
Switch
11
Label the positive and
negative ends of the cell.
+ -
answer
12
Draw a series circuit
diagram for a torch
answer
13 Draw
an arrow to show the
direction of the current for
answer
each cell.
+ -
- +
A
B
Negative
to positive
14 Match the answer to the circuit.
answer
Bright Off Dim Very Bright
Bright
Very Bright
Dull
Off
(two bulbs)
(two cells)
(cells wrong way round)
15
What is the unit of electric
current?
What is used to measure it?
Amps (A)
Ammeter
answer
16
What happens to a wire
when a large current flows
though it?
answer
It heats up due to resistance
17
What is the unit of voltage?
What is used to measure it?
answer
Volts (V)
Voltmeter
18
Name an appliance that
uses resistance to
produce heat.
answer
Oven, kettle,
straighteners etc...
19
Name an appliance
that uses variable
resistance. answer
•Dimmer switch on a light
•Volume control
20
Name the safety
device inside a plug.
How does it work?
answer
Fuse
It melts when too
large a current flows
21
Label the plug
answer
Earth
fuse
Live
Neutral
cable
Cable
grip
22
What is VOLTAGE?
answer
The energy supplied
by the cell to the
charges in the circuit
23
Where should the
ammeter be placed?
answer
A
In
series
24
Where should the voltmeter be
placed?
answer
Across the
component
V
25 What
is the voltage across
the bulbs?
answer
Series Circuit
Voltage of cell =
Voltage of all
components added
together
What is the voltage across
26
the bulbs?
answer
V
3V
Parallel Circuit
Voltage of cell
=
3V
V
3V
V
Voltage of
each
component
What is the current
measured at each ammeter?
27
2A
A
answer
Parallel Circuit
A Current at cell =
2A
A
A
1A
1A
Current of each
branch added
together
28What
is the current at each
bulb?
answer
2.5A
Current has
the same
value at all
points in a
series circuit.