How did Physics P2 go?

[Farjad Ilyas]

it was for only 1 or 2 marks anyways so dw dude. As long as the rest of your answers are matching

Can someone please tell me how TF was that k = EA/l question for only 4 freaking marks? All of the unit conversions were kinda confusing. Answer was 1 point something tera units.

Are you talking about the young modulus question? Everyone I know got 0.13TPa for that one.

 

[sadaksldjsa]

Are you talking about the young modulus question? Everyone I know got 0.13TPa for that one.

oh yeah yeah youre right. The 1. something ans I got was before I converted it to Tera, my answer was something along 0.13 too

btw, tell me, in that waves fringe seperation question. Did you first divide the total distance by 16 (16 was the number of fringes) and then multiply that by 2 to put it into lambda/a = x/D?

 

[sarmadimran]

Was there any part in question 2 where we had to subtract both energies (ke and pe)?

 

[Farjad Ilyas]

Was there any part in question 2 where we had to subtract both energies (ke and pe)?

No we just had to calculate the loss in G.P.E and final K.E which was followed by the 1 mark question asking about the difference.

 

[Farjad Ilyas]

oh yeah yeah youre right. The 1. something ans I got was before I converted it to Tera, my answer was something along 0.13 too

btw, tell me, in that waves fringe seperation question. Did you first divide the total distance by 16 (16 was the number of fringes) and then multiply that by 2 to put it into lambda/a = x/D?

The fringe separatiom can be from dark to dark fringe or from light to light. If you counted from dark to dark fringe from one end to the other in the diagram youd find that 16 fringe separations= 36mm. So I just divided it by 16 instead of multiplying it by 2

 

[sarmadimran]

What did u write in waves last part where phase difference of 180 was given?

 

[Farjad Ilyas]

What did u write in waves last part where phase difference of 180 was given?

Constructive interference because waves are in phase (path diff nlambda) at P so the displacements of D1 and D2 add to give the resultant displacement.

 

[sarmadimran]

Oh I messed up...

 

[Omaima Uchiha]

The fringe separatiom can be from dark to dark fringe or from light to light. If you counted from dark to dark fringe from one end to the other in the diagram youd find that 16 fringe separations= 36mm. So I just divided it by 16 instead of multiplying it by 2

So what was your final answer?

 

[Error Syntax]

Oh I messed up...

what did you wrote?

 

[sarmadimran]

what did you wrote?

I wrote constructive interference in 1st part where phase difference was 0 while destructive where phase difference was 180

 

[sarmadimran]

So what was your final answer?

4.5*10-7

 

[Apdhillon16]

Guysss wt was the frequency for the c.r.o question?

 

[Apdhillon16]

And also like for the question after finding the resistance thingy, wt was the p.d?? I got 0.036. I messed up I did 1.5 - 1.464 or smth like tht

 

[sarmadimran]

Guysss wt was the frequency for the c.r.o question?

500

 

[sarmadimran]

Termi

And also like for the question after finding the resistance thingy, wt was the p.d?? I got 0.036. I messed up I did 1.5 - 1.464 or smth like tht

Terminal pd was 1.46

 

[Apdhillon16]

Wait 500 Hz for frequency was correct right?? And how abt the p.d thing? Coz like I forgot the question

 

[sarmadimran]

Yup 500hz was correct... For PD we had to find loss voltages by Ir and subtracting.it from 1.5 then

 

[Apdhillon16]

So 0.036 was wrong right?

 

[techgeek]

Constructive interference because waves are in phase (path diff nlambda) at P so the displacements of D1 and D2 add to give the resultant displacement.

I think two identical waves 180 degrees out of phase will completely cancel each other out and destructive interference occurs, no?
that's what I wrote. Plus the first one, with zero phase difference was the zero order maximab?. Correct me if I'm wrong.