Physics: Post your doubts here!

[DeViL gURl B)]

http://papers.xtremepapers.com/CIE/...and AS Level/Physics (9702)/9702_s06_qp_2.pdf

Question 6
(C) please explain in detail ..

 

[ZaqZainab]

http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_s13_qp_21.pdf
Q3bii
i found v using v^2=u^2 +2as and then found the k.e using 1/2 mv^2 it was the same answer as ms but not the way would i get all the marks?

 

[robinhoodmustafa]

till 6 would be 2 waves and it would be 720
IF 360 is 3
then 60 is 0.5
cross multiply
3*60 /360

Thaaaankyou JazakAllah

 

[Haya Ahmed]

What is the difference between slit separation and slit width and can Someone explain Q5 (c) here in this paper
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w07_qp_2.pdf
Thanks ! ^_^

 

[robinhoodmustafa]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s06_qp_2.pdf

Question 6
(C) please explain in detail ..

End Correction.
Antinodes are formed liltle above the test tube so

Node to Antinode is λ /4 so you have the wavelength calculated from part B (0.648)
so insert the lamda and divide by 4.

You will get 16.2 (distance from node to antinode.. and test tube length is 15.7 so antinode is formed 0.5 (16.2-15.7) above the tube.

edit:
The wave i drew would be 2nd overtone. I mistakenly drew 1st overtone as it clearly says loud noise.

 

[ZaqZainab]

What is the difference between slit separation and slit width and can Someone explain Q5 (c) here in this paper
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w07_ms_2.pdf
Thanks ! ^_^

5c(i) width is increasing means x us increasing more light is allowed to enter and so brighter fringes brighter
(ii) slit separation increases which is a in the eqation x=landa*D/a
so if a increases x decreases x is the fringe width

 

[usama321]

usama321
Now check this question. It ask to draw a wave with PD of 60. and on x axis they have listed 1,2,3 etc so how do i know where angle 60 lies.

I understood the 180 PD one you told me earlier (Half the 360 one and start from there forward)

View attachment 42228

Make sure you lag it behind baqi samajh aa gai hai to lag behind ka scene pata hai na?

 

[DeViL gURl B)]

End Correction.
Antinodes are formed liltle above the test tube so

Node to Antinode is λ /4 so you have the wavelength calculated from part B (0.648)
so insert the lamda and divide by 4.

You will get 16.2 (distance from node to antinode.. and test tube length is 15.7 so antinode is formed 0.5 (16.2-15.7) above the tube.

edit:
The wave i drew would be 2nd overtone. I mistakenly drew 1st overtone as it clearly says loud noise.
View attachment 42241

Thank you so much!!

 

[DeViL gURl B)]

Guys .. What do u mean by lamp shortening? Or lamp shortened? :$

 

[Mohammed salik]

Guys .. What do u mean by lamp shortening? Or lamp shortened? :$

Short Circuited. Means Current Doesn't Pass through The lamp.. It passes through an alternative Path which has Lower Resistance.!
Hope this is what u Meant !

 

[DeViL gURl B)]

Ye

Short Circuited. Means Current Doesn't Pass through The lamp.. It passes through an alternative Path which has Lower Resistance.!
Hope this is what u Meant !

yes and thank u!!!!

 

[DeViL gURl B)]

Guys what do u mean by .. Slit separation and slit width?
As in what happens to the fringes by each of them ? .. Like brightness and the X ?
Hope u guys get what in askin !
Please help
Thank u

 

[Mohammed salik]

5c(i) width is increase means x us increase more light is allowed to enter ans so brighter fringes brighter
(ii) slit separation increases which is a in the eqation x=landa*D/a
so if a increases x decreases x is the fringe width

Guys what do u mean by .. Slit separation and slit width?
As in what happens to the fringes by each of them ? .. Like brightness and the X ?
Hope u guys get what in askin !
Please help
Thank u

Loot At the Figure Attached Above..!
Answered By ZaqZainab! Post #8586

 

[DeViL gURl B)]

Loot At the Figure Attached Above..!
Answered By ZaqZainab! Post #8586

Thank u ! And ZaqZainab
Okhay if u don't mind can I ask one more doubt ? Please

 

[Mohammed salik]

Thank u ! And ZaqZainab
Okhay if u don't mind can I ask one more doubt ? Please

Gi Hann! Np!

 

[DeViL gURl B)]

Gi Hann! Np!

Okhay my doubt is .. Like yaar like when they ask bout the slit thingi sorta questions .. As in what happend to the fringes etc..
U have any easy method or ready made notes on 'em ?
If yes, please share

 

[omaaaar]

First Part.
Resistance in Series : R+R...
Resistance in parallel : 1/R +1/R...
View attachment 42229

Second part.

Kirchhoff law.
Follow the Current direction and remember current divides in parallel and remain same in Series.
when is given part just focus on the direction he gives like " E2, I1 ,I2 and BCXYB part , forget about the other parts of the circuit like BYZA this way it would be easy to write down equation.
and read a bit about Kirchhoff from Book. It really helps


View attachment 42230

Thank u sooooo much for helping

 

[robinhoodmustafa]

Make sure you lag it behind baqi samajh aa gai hai to lag behind ka scene pata hai na?

ok ok. I know In Phase and out of phase wali kahaaani

btw can u find anywhere (notes,factsheet) from where i can learn the effects of changing slitseperation,width,a,Wavelength etc in double slit and diffraction grating.
I expect it a lot in the coming paper. worth 4 marks .

 

[Mohammed salik]

Okhay my doubt is .. Like yaar like when they ask bout the slit thingi sorta questions .. As in what happend to the fringes etc..
U have any easy method or ready made notes on 'em ?
If yes, please share

Hmm..! Yo Just have to Know when Light Entering Increases i.e Slit width Increases.. This Causes Brighter Fringes to Become Brighter..!
Baqi U need to Know the Equation Lambda=a*x/D! Now when ever they Change Something for E.g change a then rearrange the Equation To make A subject! Then u can use Propationality To see wht happen to Rest of the Thins..! Bas its simple!
This is What i Do !

 

[Mohammed salik]

ok ok. I know In Phase and out of phase wali kahaaani

btw can u find anywhere (notes,factsheet) from where i can learn the effects of changing slitseperation,width,a,Wavelength etc in double slit and diffraction grating.
I expect it a lot in the coming paper. worth 4 marks .

Could Plz Draw THE ans On the Wave and Post it! If u Have time PLzzz !