PHYSICS 9702 16 MAY 2016. Paper 4

****ing hell it was the hardest paper ive ever sat for

Someone just tell me what happens to the Hall voltage when conduction is using electrons or holes? You know which question I'm talking about..

yes and everyone ik all over the world says its tough af, u find it easy? lmao

Someone just tell me what happens to the Hall voltage when conduction is using electrons or holes? You know which question I'm talking about..

loool do u think the paper is easy? like its far tougher than past year papers right?

Someone just tell me what happens to the Hall voltage when conduction is using electrons or holes? You know which question I'm talking about..

I said with holes the effect is same but on the other side.
if it makes sense....

1. What thermometers did you use btw? For the ultrasound pulse and the Bunsen flame?

Your class must be great at physics because my class found it extremely hard (some didn't know about the Hall voltage).. The paper for me, wasn't absolute hell but it wasn't exactly a breeze either.. Like any other physics paper..

I could see why it was difficult because the questions were a mesh of recalling and application.. How the X-ray spectrum is like that is mentioned in usually one little page as a little detail in the physics textbook.. The binary star thing was crazy because mostly everyone had a unique different answer xD

2. What did you get for the mass of your planet?

EDIT:
Might as well add a couple more questions..
3. Why did the iron core cause a voltmeter reading at Q?
4. What was your e.m.f. versus time graph for that induction question?
5. What is your highest audio frequency used in the transmission?
6. Why do we consider spherical charges as if they're point charges with the charge concentrated at the centre (with reference to field lines)
7. Attenuation coefficient of lead: did you get 0.06 mm^-1 ish? And does it decrease, remain the same, or increase in aluminium?
8. Obviously, how did the X-ray spectrum show up like that?
9. Hall voltage with holes affect it or not?
10. Define gamma radiation (hehehehe just to be sure)
11. Two uses of capacitors besides smoothing direct current?
12. What does infinite slew rate mean? (Hehehehehe just to be sure)

1. What thermometers did you use btw? For the ultrasound pulse and the Bunsen flame?

Your class must be great at physics because my class found it extremely hard (some didn't know about the Hall voltage).. The paper for me, wasn't absolute hell but it wasn't exactly a breeze either.. Like any other physics paper..

I could see why it was difficult because the questions were a mesh of recalling and application.. How the X-ray spectrum is like that is mentioned in usually one little page as a little detail in the physics textbook.. The binary star thing was crazy because mostly everyone had a unique different answer xD

2. What did you get for the mass of your planet?

EDIT:
Might as well add a couple more questions..
3. Why did the iron core cause a voltmeter reading at Q?
4. What was your e.m.f. versus time graph for that induction question?
5. What is your highest audio frequency used in the transmission?
6. Why do we consider spherical charges as if they're point charges with the charge concentrated at the centre (with reference to field lines)
7. Attenuation coefficient of lead: did you get 0.06 mm^-1 ish? And does it decrease, remain the same, or increase in aluminium?
8. Obviously, how did the X-ray spectrum show up like that?
9. Hall voltage with holes affect it or not?
10. Define gamma radiation (hehehehe just to be sure)
11. Two uses of capacitors besides smoothing direct current?
12. What does infinite slew rate mean? (Hehehehehe just to be sure)

1. for Bunsen burner I wasn't sure so I wrote mercury.. I know its wrong. for the other thermocouple.
2.mass of the plnet, tbh I don't remember it at all. what about you? I remember the distance d I got 0.7x10^6
3.because it induces emf in p so because of Newtons 3rd law and lenz's law an emf in q is produced.
4.i just did the same thing.....
5.230 Hz the last band value.
6.Because they all meet at a point in the centre. I drew a diagram too.
7.yes! did you do gradient or the other way? I fist did the other way then crossed out for gradient.
8.because of electrons having many wavelengths and so photons also have many energies.
9.i said no. voltage is same but in the other direction.
10. Its in te electromagnetic radiation section with no charge produced when unstable nuclei divide...
11.igot stuck on that so I said chargers and alarms.
12.no idea......

omg i get distance d= 0.7x10^8, and to find mass b u use Fc=Fg?
Also for the attenuation coeffiecient, do u get exact 0.06? i got like 0.058333, u drew best fit line right?

I couldn't get how to do the distance. The formula was getting sooo messy. so I just did quarter of the value because d was placed more than half away.....XD my friend also got same.
yea that's what I did for mass. but I hope to get ecf from first part.
Yea I drew best fit.]got 0.0583 so I rounded to 0.06

Oh and I you asked me if co-efficient was bigger or smaller,
I said in Aluminium its more because it easily penetrates through.

and for the induced emf question, how do u draw the graph?

this was the HARDEST physics paper Ive ever done.

Ive done harder ones... like Chemistry paper 42 and Physics in October November 22...

this is definitely the most difficult physics paper though, the first question caught a lot of people right off the bat.