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# Edexcel IAL Physics Unit 2 WPH02 May June 2016 Discussion

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1. (Original post by ToxicPhantom007)
5.3 ohms
It was not inv becasue the line was not straight and gradient was not same at any point
Though i dont think its correct :P
5.3 ohms was the alreday stated resistance of the resistor right?? We needed to find the temp for the corresponding internal resistance when the resistance of the resistor was 5.3 ohms ..isnt it?
2. (Original post by Zainat0987)
5.3 ohms was the alreday stated resistance of the resistor right?? We needed to find the temp for the corresponding internal resistance when the resistance of the resistor was 5.3 ohms ..isnt it?

You basically had the resistance of the thermometre and then use your graph to get the temperature
The answer i got was 40degrees
3. Oh wait I thought you were asking some other question
For thermistor it was 2.1k ohms then from graph the temp was 41
4. (Original post by Mesuteyezil)
Haha don't stress, you'll do well.. what do you think about the grade boundary?
This paper had an alt. name "stress"
It better be lower then 49
What do u think?
5. in the efficiency question,what should we use to calculate power, emf or pd?
6. (Original post by ToxicPhantom007)
angle= 180 + 55 = 235

temp=41

thw wrong part was that the charge is not "stored" it is produced

yes
What if I add 360? it would still be the same angle?
7. Hey guys, what was the other possible angle for polarisation???
8. (Original post by Tanishaxx)
Hey guys, what was the other possible angle for polarisation???
235

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What if I add 360? it would still be the same angle?
i did 180-55... and what was your explanation for the racing car doppler effect??
10. (Original post by 12103763d)
in the efficiency question,what should we use to calculate power, emf or pd?
I used the pd, what about u?

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11. (Original post by mira99)
I used the pd, what about u?

Posted from TSR Mobile
Same here, but idk if it's correct , lots of debates here...
12. I think you had to take emf because that is what the solar cell generates and the efficiency was for solar cell not any other component in the circuit so emf should ve been used
13. (Original post by Tanishaxx)
i did 180-55... and what was your explanation for the racing car doppler effect??
As the car passes X the freq decreases because the wavefronts move away from each other and wavelength increases
14. (Original post by ToxicPhantom007)
I think you had to take emf because that is what the solar cell generates and the efficiency was for solar cell not any other component in the circuit so emf should ve been used
What did you get for the mcq about the frequency of the refracted light?
same f
16. Anyone here from PAK...
and where are you guys are giving exams from?

I am giving from KSA Jeddah
17. (Original post by 12103763d)
in the efficiency question,what should we use to calculate power, emf or pd?
18. (Original post by wenogk)
4 marks
19. (Original post by 12103763d)
4 marks
Oh sorry not this question I meant the angle of polarization question..
20. (Original post by wenogk)
Oh sorry not this question I meant the angle of polarization question..
3 marks

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