physics paper 2 2012

[IGCSE1234]

Hey everyone what are going to do for physics? if any doubts or questions u may ask here and we will disuss the paper here too after we take the exam (24 hours)?

 

[IGCSE1234]

here are some websites that might help:
http://www.s-cool.co.uk/gcse/physics
http://www.revisioncentre.co.uk/gcse/physics/
http://www.gcsescience.com/gcse-physics-revision. html
http://www.bbc.co.uk/schools/gcsebitesize/science/aqa/
http://www.gcse.com/energy. html
http://revision-notes.co.uk/GCSE/Physics/index.html
http://gcserevision101.wordpress.com/physics-p3/
http://www.thestudentroom.co.uk/wiki/Category:GCSE_Physics_Revision_Notes
http://revisionworld.co.uk/gcse-revision/physics
http://www.u2learn.com/gcse-physics-links.html
And here are some e-books too:
http://www.certified-easy.com/online-ebooks/_igcse_physics-1.html
hope this helped

 

[IGCSE1234]

Papers 2 and 3 Tips:
These are the papers that test your knowledge and understanding of Physics theory and the
ability to apply your knowledge to situations described on the paper. The following includes
some tips on how to read the questions and advice on particular items in the syllabus that
often seem to be poorly understood or applied. (This does not mean that other parts of the
syllabus require any less revision of course!).
Reading the questions:
• It is very easy when presented with a diagram question to look at the diagram and then
try to answer the question. You must read and understand the introductory sentences
above the diagram first before trying to answer the question. There may be a part of the
question near the end which requires you to use a piece of information that is included in
the introductory sentences in your answer.
• Be careful how you answer your questions. An explanation of some Physics (even if
correct) that does not answer the question set does not score marks.
• If there are three marks available for a calculation, two of the three marks are for showing
your working.
• If a question states ‘accurately mark’ or ‘accurately draw', the examiners expect points
(e.g. a centre of gravity) to be carefully positioned and lines to be drawn with care using a ruler. In the case of ray diagrams it is expected that rays drawn should pass at least
within 1 mm of the relevant point (e.g. principal focus).
• When reading the questions, decide which area of Physics you are being asked about.
Do not just look at a few words as you may then misunderstand the question. For
example a question that mentions heat radiation is not about radioactivity (just because
the word 'radiation' is seen). If you are asked for a convection current diagram do not
draw a circuit just because the word ‘current’ is in the question!
Answering the questions:
• You must understand the turning effect of a force and that it is called the moment of the
force.
• You must be clear about the names given to types of energy and use them appropriately.
• You should know that a substance melts and freezes at the same temperature and also
understand the ice and steam points as used in the calibration of thermometers.
• You should know the circuit symbols required for use in describing electrical circuits. The
symbol for a fuse is often not known and the symbols for a thermistor and a variable
resistor are commonly confused with each other.
• You must know how to connect a voltmeter in parallel with the component across which
you are measuring the potential difference.
• You must have a clear understanding of electromagnetic induction. For example, you
must know that when a magnet is moved in or out of a solenoid that is part of a circuit, a
current will be induced. It is the movement of the magnet in the solenoid that causes the
current as its magnetic field lines cut the coil.
• You must understand and be able to explain the concept of terminal velocity.
• You must understand the difference between mass and weight.
• You must be confident in drawing diagrams showing wavefronts as well as those showing
rays.
• You must understand basic radioactivity. You should know about the characteristics of
the three types of emission (alpha, beta and gamma), half-life and safety precautions.
The difference between nuclear fission and nuclear fusion must also be understood.

 

[IGCSE1234]

There are already the same tips there!

 

[IGCSE1234]

Rules​

Average speed = total distance travelled / total time taken.
v = d / t
v = speed in m/s
t = time taken in s
d = distance
—————–
Acceleration = change in velocity/time taken.
a = (v – u)/ t
Or by using this formula
v = u + a t
Where
a = acceleration in m/s2
u = initial velocity in m/s
v = final velocity in m/s
t = time taken in s
————-

F = ma​

F = force N
m = mass kg
a = acceleration m/s2
———-
Weight = mg
weight is a force of gravity acting on a body N
m = mass kg
g = acceleration due to gravity in m/s2
Force has unit of N or kg.m/s2
——-
density = mass / volume
density kg/m3
(or according to the unit used)
————

Moment about a point = Force × Perpendicular distance from the pivot​

————–​

Load = constant x extension​

F = k.X​

————-​

Pressure = force / area​

pressure in Pa or N/m2​

force in newton​

area in meter squared​

—————–​

in Manometer​

Actual pressure = atmospheric pressure + excess pressure (difference)​

————–​

K.E. = 1/2 mv2
P.E. =m g h
—————
Work (energy) = F x distance
work in J
Power = Work (energy) / time
power in W
———<a
gas law

Image via Wikipedia​

as volume decreases pressure increases (inversely proportional)
but
and the other two relationships are directly proportional
as temp increases volume increases (expansion)
as temp increases pressure increases
————
Revise …………………units
length m
mass kg
speed m/s
acceleration m/s2
force , weight N
work J
energy J
(any form of energy as heat, PE, KE, others) J
Power W
Revise…………………. tools used to measure
time
mass
weight
length
measuring time differences
measuring irregular volumes
calculating
- density
- speed
- acceleartion

 

[Mohamed Ghareeb]

Thnx

 

[IGCSE1234]

no problem

 

[IGCSE1234]

good luck everyone and i will be there for any question from 7:30 am till 1:30 cuz i have my exam at 3:00 isa it will be fine just solve the past papers and read the notes by eye good luck !!!!

 

[IGCSE1234]

is anyone doing core paper 2 physics or is it just me cuz i can't find anyone doing except paper 3 and they say it is hard

 

[ShOlO]

I'm doing Paper 2 at 3:00 pm EG time

 

[IGCSE1234]

same here

 

[ShOlO]

I Hope it comes Easy ! ( i doubt that .. )

 

[IGCSE1234]

me too but i feel bad about it not sur why isa it will be tamam

 

[ShOlO]

U from Alex or Cairo ?

 

[IGCSE1234]

we have physics p6 next so there will be another thread to discuss it with this title "physics paper 6 2012" of course after we discuss paper 2 ok everyone !

 

[Mohamed Ghareeb]

I am doing the exam paper2 at 2:00 Alexandria , Egypt

 

[IGCSE1234]

well good luck

 

[IGCSE1234]

how was the exam? I bet it was good cuz i found it so if u have any questions about it please post it on the thread !!

 

[IGCSE1234]

most questions that annoyed some of my friends were the speed time graph and the switches and some said the half-life.

 

[ShOlO]

The Switch is the pull-cord ,It was a repeated question ! and whats with the half life ? , Th Speed time graph was meeh , a bit annoying , other than that , the exam was better than i was expecting !