Physics: Post your doubts here!

[Hadi Murtaza]

Thanks sameen I just didn't know this formula!
And hey can you help me with number 14 as well?

i can help u in dat

 

[sara kamal]

(j) describe practical examples of forced oscillations and resonance
(k) describe graphically how the amplitude of a forced oscillation
changes with frequency near to the natural frequency of the
system, and understand qualitatively the factors that determine
the frequency response and sharpness of the resonance
(l) show an appreciation that there are some circumstances in which
resonance is useful and other circum

can anyone explain me these points in syllabus from chapter simple harmonic motion(A2)?thanks in advance!

 

[Suchal Riaz]

Answer was uploaded!






The question 7 is left, Suchal Riaz

 

[Faaiz Haque]

Suchal Riaz thanks a lot man!

One question about 4 B
View attachment 40338

How do we know n = 1?

 

[sweetjinnah]

The answer for N is correct, but the equation does not solve it. Could you see this too?

 

[Hadi Murtaza]

View attachment 40429

where is da question ?

 

[sweetjinnah]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w10_qp_42.pdf

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w10_ms_42.pdf


Q 5 c (ii)

I just don't get it -_-

 

[sweetjinnah]

where is da question ?

somwhere above

 

[sweetjinnah]

where is da question ?

M/J 2005 Q7c
http://papers.xtremepapers.com/CIE/...and AS Level/Physics (9702)/9702_s05_qp_4.pdf

 

[daredevil]

View attachment 40430

how did u reach B0/Bn = mo/mn ??

 

[sweetjinnah]

Can u inbox me ?

edited my reply check

 

[sweetjinnah]

how did u reach B0/Bn = mo/mn ??

Bo= mov/qr nd Bn= mv/qr ..v , q nd r are same so they cancel each other..

 

[A star]

http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_w12_qp_43.pdf Q8b(i) why did they take the rest mass different for proton and neutron when in the data sheet they have given only one value

 

[RoyalPurple]

papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_s13_qp_21.pdf

Q5 (c) how do we know that a maxima is observed at point P?

 

[usama321]

papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_s13_qp_21.pdf

Q5 (c) how do we know that a maxima is observed at point P?

Calculate the path difference between the two waves, which is .15m. Now use the wavelength from part b and divide the path difference with it.

.15/0.025 = 6 waves. This means that wave S2 has travelled 6 complete oscillations more than S1 before reaching the screen. Furthermore, as the number is a whole number, we know that there will be constructive interference. Thus there is a maxima at P.

You can also calculate this by dividing the paths of both the waves with the wavelength. One would be 30, the other 36

 

[sweetjinnah]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w12_qp_43.pdf Q8b(i) why did they take the rest mass different for proton and neutron when in the data sheet they have given only one value

they said to use data from Fig.8.1 given in the qts not the values from data sheet

 

[RoyalPurple]

Calculate the path difference between the two waves, which is .15m. Now use the wavelength from part b and divide the path difference with it.

.15/0.025 = 6 waves. This means that wave S2 has travelled 6 complete oscillations more than S1 before reaching the screen. Furthermore, as the number is a whole number, we know that there will be constructive interference. Thus there is a maxima at P.

You can also calculate this by dividing the paths of both the waves with the wavelength. One would be 30, the other 36

thank you stay blessed

 

[Hadi Murtaza]

thank you stay blessed

U2

 

[Atif Aziz]

B Part, in detail please, explain any formulas used :/

 

[areebaization]

Somebody please help me with this op-amp graph?http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_w13_qp_43.pdf
Q9 b ii
Also are there any notes for op-amp graphs? I never get the hang of them