Physics Paper 5 tips

[SkyPilotage]

When do we use an EHT Supply? In which experiments?
EHT = Extra High Tension , this means that it has a high voltage and low current? or not necessarily low current?

 

[Aqsa Mohd]

AsSalamoAlaikum Wr Wb!

Came across an important note [atleast I am reading this for the first time], so wanted to share it with you all.

Rounding errors were also made. A number of candidates only used one decimal place for lg d. It is expected that the number of significant figures in calculated quantities should be the same or one more that the number of significant figures in the raw data; however, in logarithmic quantities the number of significant figures is determined by the number of decimal places. In this question, since d was given to two significant figures, it was expected that lg d should have been given to either 2 or 3 decimal places.

^extract from June:2009 Examiner Report, Paper 5.

smzimran alphabravocharlie angelgirl:) Aqsa Mohd Mustehssun Iqbal hassam SkyPilotage

thanks alot .. dis is very helpfull

 

[angelgirl:)]

AsSalamoAlaikum Wr Wb!

Came across an important note [atleast I am reading this for the first time], so wanted to share it with you all.

Rounding errors were also made. A number of candidates only used one decimal place for lg d. It is expected that the number of significant figures in calculated quantities should be the same or one more that the number of significant figures in the raw data; however, in logarithmic quantities the number of significant figures is determined by the number of decimal places. In this question, since d was given to two significant figures, it was expected that lg d should have been given to either 2 or 3 decimal places.

^extract from June:2009 Examiner Report, Paper 5.

smzimran alphabravocharlie angelgirl:) Aqsa Mohd Mustehssun Iqbal hassam SkyPilotage

thanks alot...but unfortunately i saw it after my exam...

 

[smzimran]

A request to members of the next A2 batch :
Remember this link (gather them all in a good thread) because the first 5 posts on the first page are very helpful!

 

[Muhammad Bin Anis]

A request to members of the next A2 batch :
Remember this link (gather them all in a good thread) because the first 5 posts on the first page are very helpful!

your Season coming soon

 

[Goku]

Experiments that have been asked to be designed so far:

1. investigating the terminal velocity of a steel ball dropped in oil and it's relation to the radius
2. determining the resistivity of glass
3. determining the Young modulus of wood
4. investigating the relation between the depth of a nail being hammered into wood and the speed with which it's hammered (jobless much?)
5. determining the absorbtion coefficient of glass
6. investigating the relation between the amplitude of a sound wave and the air pressure inside a double-glazed window
7. investigating the relation between the resistance of an LDR with the distance from the light source
8. investigating the relation the volume of air in a bottle and its resonant frequency
9. investigating how the emf in a coil Y depends on the frequency of the current in coil X
10. investigating the relation between the strength of the magnetic field and the radius of the coil, using a hall probe

I didn't go through all the variants so someone else can add to the list.

OMG.Why did i not see this before?

Okay so im gonna try and see what we can do to solve these,people please correct/add to this!!


1 - Measure time for each ball of different radius and put in some equation. (Which one??!)
2- R=(rho)L/A - Vary length of the glass.
3- Stress/strain. (I dont know how to go about this)
4-
5- I have NO idea. What formula do we use?
6- Idk
7- Yes! this is fairly simple. R is inversely proportional to the intensity of light
8- Try different volumes,and the loudest heard sound will correspond to that particular volume ?
9- Vary current,see what effect that has on the emf.
10- No idea!! :/

 

[biba]

thanx alot evry1

 

[abcde]

This is the single most helpful piece of p5 tips on XPC. Thank you arlery!

 

[abcde]

Does anyone know anything about the projection method for measuring angles in Physics Paper 5?

 

[VelaneDeBeaute]

Does anyone know anything about the projection method for measuring angles in Physics Paper 5?

Would you quote a question for instance?
Although I'm guessing it'd probably be the same techniques encountered in the whole 'Projectile motion' lessons, you see!

 

[arlery]

This is the single most helpful piece of p5 tips on XPC. Thank you arlery!

You're welcome.

 

[amanbro]

good job

 

[SararaIH]

Im just feeling that you surely require prior knowledge of experiments for question one in paper 5.
To investigate force and acceleration, who would think of an air glider track !
Projectile motion, wooden board with a small ramp on a side.. its hard to think of such experiments without having prior knowledge in the exam.
Investigating polarisation, or an a.c voltmenter (signal generator + cro) , etc.... Lots of prior knowledge of experiments required...
Thats the only thing that is worrying me about Paper 5.... that they may ask for an experiment where I have no idea how to perform it... that will cost be 15 marks ..

I know what you mean
I'm going through the same problems
It is very difficult to know where and how to study for paper 5
I've been searching various sites online but all I found were tips and tricks to improve your answers rather than how to get a better knowledge about the basics.
I suggest you read the 'Measurement and Technique' and the 'Physical Quantities and Units' chapters of the physics books that you have. From there you can get a better knowledge about different measuring instruments and techniques and how to carry out experiments using these instruments and also how to calculate uncertainties and stuff like that.
That's what I'm going to do. And then I'll start solving question papers and read the mark schemes accordingly so that overall, hopefully, my idea of what to write and how to write it will be a lot easier.
I hope this advice helps!

 

[anishniroula]

We have been taught by this.
Firstly calculate valie of log upper limit. then calculate the value of log lower limit. Now subtract these two and divide it by two.
For eg: if it is 50+/- 5 then. firstly calculate value of log(55) now calculate the value of log(45) and now subtract log(55)-log(45) and now divide it by two.

 

[SararaIH]

We have been taught by this.
Firstly calculate valie of log upper limit. then calculate the value of log lower limit. Now subtract these two and divide it by two.
For eg: if it is 50+/- 5 then. firstly calculate value of log(55) now calculate the value of log(45) and now subtract log(55)-log(45) and now divide it by two.

Will we always use log?
What if they mention no log, then will we still use log to calculate the uncertainty?

 

[afoo.666]

Thanks alot.

 

[anishniroula]

Will we always use log?
What if they mention no log, then will we still use log to calculate the uncertainty?

No, log is only used you have been asked to calculate unceratinity in log and ln(mostly when powers are given). in other cases like squares you should not use log.
May be it helped. ;-)

 

[Wanderer]

N09/51 Q1
How are we supposed to draw diagram for the measurement of resonant frequency..
I know there has to be a loudspeaker connected to a signal generator facing the opening of some long tube..but i can not understand what to do next..please help...

 

[Wanderer]

What are the normal ranges of an ammeter and voltmeter?

 

[SararaIH]

No, log is only used you have been asked to calculate unceratinity in log and ln(mostly when powers are given). in other cases like squares you should not use log.
May be it helped. ;-)

Thanks so much!