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2398233
Physics - Electricity
Descrição
National Five physics electricity unit summarised.
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nationalfive
physics
mindmap
physics
electricity
higher school certificate(hsc )
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dana-howbridge
, atualizado more than 1 year ago
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dana-howbridge
mais de 9 anos atrás
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Resumo de Recurso
Physics - Electricity
Charge
When a charge is placed near a charged object, it will experiance a force.
1C=1As-1
Conductors
Metals, carbon
Insulators
Glass, plastic, wood
current is the flow of electrons
1A= 1Cs-1
Voltage is the amount of electrical energy given to electrons by the battery
1V=1JC-1
Resistance is material opposes current
V=IR
The higher the resistance the smaller the current
Series circuit
The current is the same at different positions
Vs=V1+V2+V3
Rt=R1+R2+R3
Parallel circuit
I=I1+I2+I3
The voltage across the resistors is the same
1/Rt=1/R1+1/R2+1/R3
Changes energy into electrical energy
Microphone
Thermocouple
Solar cell
Thermistor
LDR
Changes electrical energy into different energy
Loudspeaker
Motor
Lamp
LED
A capacitor is a device which can store charge
Transistors
MOSFET
Turns on at 2V
NPN
Turns on at 0.7 V
Power is the change of energy over time
Mains supply is 230V
P=E/T
1W=1J/S
AC is current that travels in both directions
50HZ in Britain
Current changes direction 50 times per second
Direct current is when current flows in one direction
R1/R2=V1/V2
conduction is heat transfer in solids
convection- liquids and gases
Work done is when energy changes into another form of energy
Ew=Fxd
Pessure is the force an object exerts over an area
P=F/a
P1/T1=P2/T2
P1V1=P2V2
Anexos de mídia
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