# Physics Revision Notes

My notes for my mock. Hoping for an A*

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• Created by: Alex
• Created on: 10-01-11 17:53
Word Document 914.61 Kb

## Pages in this set

### Page 1

IGCSE Physics-Revision
Heat
Temperature: measurement of hotness of a body. Measured in Kelvin or Celsius.

Thermal capacity (s.h.c): The heat energy needed to raise the body by one degree (Units J°C¯¹)

To find the amount of heat to raise a body: H=m x c (-)
E.g. How much heat is…

### Page 2

Forces and motion

Force is something that tries to change the shape, speed and direction of an object
UNITS: Newtons
Shown as a diagram of a proportional arrow

Generally: Force=mass x acceleration (Newton's 2nd law)

So: acceleration= force ÷ mass

Work is how much energy was used in the movement…

### Page 3

Liquid pressure=height x density x gravity

Circuits
A battery is a source of electric current

Ammeter to measure flow of current Volt metre to measure energy change

Current is the flow of electrical charge. The charge is measures in coulombs

Q=It (Charge=current x time)
Electromotive force (E.M.F) - This is…

### Page 4

R=1/R1+1/R2+1/R3 Then use V=IR to find current in b

The potential divider- this is the output voltage in a section of a linear circuit.

(Vin=power supply/Vout=potential divider)
R1=7
R2=6
Vin=12
V (out) V (in)×6
R2) V (out) =
R2
V (in) = (R1+ 13

V (out) = 72
13 =…

### Page 5

Wave Motion

A wave is a movement of a DISTURBANCE through a source, such as water...
This movement is a transfer of energy from a source to a surrounding area...

Waves can be split into two groups...

Mechanical Waves Electromagnetic Waves
Waves on springs Infra-red
Waves…

### Page 6

Transverse and longitudinal waves

Transverse wave ­ all the particles vibrate at a right angle to the direction. Each particle is slightly
out of step with the next. There is no overall movement

Eg, Water waves

Longitudinal waves ­ all particles vibrate in the same direction of which the wave…

### Page 7

Electronics

The diode ­ this is a rectifier which works on half
wave rectification.

A full-wave rectifier ­ this converts an AC to a DC

A light dependant resistor (L.D.R) ­ this uses light to determine the amount of resistance
As light intensity increases, the resistance decreases.

A transistor these…

### Page 8

Magnetic fields due to electric currents

A single wire with a current will give off a magnetic field

A solenoid is a coil which is wound on a cylinder. It
has a magnetic field like a bar magnet but the field
flows inside the solenoid.

Fleming's left hand rule will…

### Page 9

Fleming's right hand rule is used to find induction in a straight wire

EQUATIONS FOR
RESITORS

1.

Vs÷VP=Ns÷Np ­ V=volts carried
N= number of turns

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# Physics Revision Notes

My notes for my mock. Hoping for an A*

• Created by: Alex
• Created on: 10-01-11 17:53
Word Document 914.61 Kb

## Pages in this set

### Page 1

IGCSE Physics-Revision
Heat
Temperature: measurement of hotness of a body. Measured in Kelvin or Celsius.

Thermal capacity (s.h.c): The heat energy needed to raise the body by one degree (Units J°C¯¹)

To find the amount of heat to raise a body: H=m x c (-)
E.g. How much heat is…

### Page 2

Forces and motion

Force is something that tries to change the shape, speed and direction of an object
UNITS: Newtons
Shown as a diagram of a proportional arrow

Generally: Force=mass x acceleration (Newton's 2nd law)

So: acceleration= force ÷ mass

Work is how much energy was used in the movement…

### Page 3

Liquid pressure=height x density x gravity

Circuits
A battery is a source of electric current

Ammeter to measure flow of current Volt metre to measure energy change

Current is the flow of electrical charge. The charge is measures in coulombs

Q=It (Charge=current x time)
Electromotive force (E.M.F) - This is…

### Page 4

R=1/R1+1/R2+1/R3 Then use V=IR to find current in b

The potential divider- this is the output voltage in a section of a linear circuit.

(Vin=power supply/Vout=potential divider)
R1=7
R2=6
Vin=12
V (out) V (in)×6
R2) V (out) =
R2
V (in) = (R1+ 13

V (out) = 72
13 =…

### Page 5

Wave Motion

A wave is a movement of a DISTURBANCE through a source, such as water...
This movement is a transfer of energy from a source to a surrounding area...

Waves can be split into two groups...

Mechanical Waves Electromagnetic Waves
Waves on springs Infra-red
Waves…

### Page 6

Transverse and longitudinal waves

Transverse wave ­ all the particles vibrate at a right angle to the direction. Each particle is slightly
out of step with the next. There is no overall movement

Eg, Water waves

Longitudinal waves ­ all particles vibrate in the same direction of which the wave…

### Page 7

Electronics

The diode ­ this is a rectifier which works on half
wave rectification.

A full-wave rectifier ­ this converts an AC to a DC

A light dependant resistor (L.D.R) ­ this uses light to determine the amount of resistance
As light intensity increases, the resistance decreases.

A transistor these…

### Page 8

Magnetic fields due to electric currents

A single wire with a current will give off a magnetic field

A solenoid is a coil which is wound on a cylinder. It
has a magnetic field like a bar magnet but the field
flows inside the solenoid.

Fleming's left hand rule will…

### Page 9

Fleming's right hand rule is used to find induction in a straight wire

EQUATIONS FOR
RESITORS

1.

Vs÷VP=Ns÷Np ­ V=volts carried
N= number of turns