End Of Set Test Flashcards
What can waves do?
Carry energy from one place to another
What do sound waves travel through?
A medium
What is the number of waves that pass a point each second called?
Frequency
What is the frequency or pitch of a sound a measure of?
How high or low it is
What is the frequency or pitch measured in?
Herts (Hz) and the symbol for it is an “f”
What is velocity in physics terms?
“V”
What is the loudness (amplitude) of a sound?
The height of the wave above the starting point
What is the energy of a sound caused by?
Vibrations
What are sound waves an example of ?
Longitudinal waves but they are drawn as transverse waves
What can sound not travel through?
A vacuum
What can sounds travel well through?
Solids, liquids and gasses
What is velocity another word for?
Speed
What is electricity a movement of?
Electrons
What does current measure the flow of?
Electrons
What is current measured by?
Ammeters (A) in amps
What is an ammeter always connected in/by?
Series
What is voltage also called?
A potential difference
What does a voltage measure?
How much energy is available for use by the components in the circuit
What is the voltage provided by?
The cells/batteries/power supply’s used
What is voltage measured by?
A volt meter in volts (V)
What is resistance a measure of?
How hard it is for the electrons to move around the circuit
What things have resistance?
All components and wires have resistance
What is resistance measured in?
Ohmmeter or ohms (Ω: the Greek letter omega)
What measures current and resistance?
A multimeter
What is electrical power the rate of?
The rate at which an electrical appliance uses energy
What type of appliances use the most power?
Appliances that use heat
What is power measured in?
Watts (W)
What does one watt (W) of power mean?
That the alliance is using one joule of energy each second
What can electrical power be calculated as
Power=current x voltage (or p=IV)
What is a resistor a component of?
A circuit designed to reduce or limit the current
What is a conductor?
A material which lets energy flow
What is an insulator?
A material which does not let energy flow
In a series circuit how many paths are there for current flow?
One path
What do parallel circuits have?
Junctions that the Currents that can split or join at
In a series circuit what is the current flow like?
Same in all places
In a parallel circuit what is the brightness in bulbs like?
Same in all the bulbs regardless of how many bulbs there are
What are fuses?
Safety devices that have a wire that breaks if too much current flows through it
What is the symbol for current
“I”
What is a singular power cell called
A cell
What are two power cells called
A battery
What is heat a form of?
Energy
What does thermal mean?
Heat
What is the temperature a measure of?
How hot an object is
How is the temperature measured?
With a thermometer
What does there need to be for heat to move from one place to another?
A temperature difference
Where does heat travel from?
A warmer area to a cooler area
What do different metals conduct at?
Different rates
What do insulators not allow to travel through easily?
Heat
What are liquids and gasses both?
Liquids and their particles move
What is infrared radiation part of?
The electromagnetic spectrum
What does Infrared radiation travel as?
A wave
What does heat travel by
By Infrared radiation through space and no particles are involved
What can happen if radiation hits something?
It can be absorbed or reflected
What surfaces reflect the most radiation?
Light coloured and shiny surfaces
What surfaces absorb the most radiation?
Dark coloured and dull(matte) surfaces
What does heat loss in a house depend on?
The temperature difference between the inside and outside of the house
What can heat transfer be reduced in?
A building
What can reducing heat loss do?
Save money and energy
