NEW
Font size
WorksheetsEnergy and Change Revision
Total questions: 40
Worksheet time: 20mins
An object with equal charges is
charged
neutral
positively charged
negatively charged
Objects become charged when
they rub against each other
they touch each other
conduction takes place
convection occurs
Protons can transfer to other objects
when friction occurs
there is a transfer of electrons
when they discharge
they cant transfer
negative charges repels negative charges
True
False
Positive charges attract
negative charges
positive charges
Discharging extra electrons safely requires
us to touch it
push it
hold it
earth it
Van de Graaff generator demonstrates the effects of
electricity
electrostatic charge
friction
making your hair stand up
The movement of electrons through a
conductor
Flow
Current and amps
electric current
movement of heat
Electrons move in the same direction
True
False
We say that electrons in metal are
delocalised
move around safely
attract other metals
magnetic
Conducting wire is made of
wires
metal
recycled material
plastic
Wire is covered with plastic to prevent
conduction
convection
isolation
static
An electric circuit is defined as
is a path in which electrons from a current flow to a source.
the movement of charge in a closed conducting circuit.
is the path electricity flows in a grid.
movement of power
Another word for cell is
Adaptor
Cellulous
Battery
Amp
How many cells are there in two 9V batteries?
2
3
4
6
Cells have positive and negative terminals?
True
False
A circuit must be closed in order for the device to work.
True
False
What is the output of a simple bedside lamp circuit.
The voltage
The light bulb
The electrons
The resistors
These symbols represent
Cells
Resistors
Switch
Light bulb
These symbols represent
Cells
Resistors
Switch
Light bulb
This diagram represents
A series circuit
A parallel circuit
Both series and parallel
We call this a
Circuit board
Electrical meter
distribution board
Amp meter
You will find a __________ here for saftey
Circuit breaker
Fuses
Fuse breaker
Circuit stopper
An ac adaptor is used
to change the voltage of power
to alternate current
slow current down before it gets to the device
increase voltage to power devices
TO generate a magnetic field is one of
the properties of electrical flow
the effects of an electric current
main purpose of a resistor
last resort in a circuit
As the resistance in a circuit increases, the electric current __________.
Increase
Decrease
stays the same
What is the unit for resistance?
Volts
Amperes
Ohms
A lemon has ____________ inside of it.
Electrodes
Voltage
Electrolytes
Electrical Energy
I am the crackle you hear when you touch a doorknob after rubbing your feet across a carpet.
Circuit
Discharge
Fuse
Conductor
I open overloaded circuits by melting.
circuit
conductor
fuse
resistor
Which circuit will have the brightest bulbs
series
parallel
The image of the bulbs above tell us...
That both bulbs draw on 3.83 V
That the battery is 7.66 V
The bulbs have different resistance
The battery is the wrong way around
Which way do electrons flow?
Positive to Negative
Negative to Positive
What is the unit of measurement for current
Ohm's
Amperes
Volts
In a parallel circuit with 2 lightbulbs, if you take out one lightbulb what will happen to the rest?
They will all go out.
The other one will stay on
In a series circuit what happens when you add another bulb?
The bulbs gets brighter
The bulbs gets dimmer
Nothing changes
Double Voltage occurs
If there is a 12V battery with three light bulbs in series, the light bulbs will draw on _________ .
12 V
3 V
4 V
6 V
If there is a 12V battery with three light bulbs in parallel, the light bulbs will draw on _________ .
12 V
3 V
4 V
6 V
When a circuit is closed, the load is _____________?
on
off
What does LED stand for?
Light Evident Device
Low Evident Device
Light Emitting Diode
Low Emitting Diode
