Physics: Post your doubts here!

[ZainH]

Is this correct?
Blue line is where maxima would be observed and red line is where minima would be observed.

 

[daredevil]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s12_qp_21.pdf
Question 5, b(ii), why for R they divided 0.9 by 1 ? then why *4?

because 1m is the total length and the part of the length they are taking is 0.9 as u know R is directly proportional to length.
and then the resistance of the total length is 4 ohm they multiply by 4.
if u don't get it this way then use the ratio method: -

0.9 : x
1 : 4

cross multiply and u willl get (0.9/1) * 4

 

[daredevil]

Is this correct?
Blue line is where maxima would be observed and red line is where minima would be observed.

yeah... its constructive interference at the blue part and destructive at the red part.
but hre's a tip. in the paper draw the destructive interference exactly between two constructives.. that way u know its exactly in the middle becz only the exact middle will give the dark fringe

 

[1357913579]

http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_s11_qp_23.pdf
can someone please sketch this
6(b) and c(iv) some one please
daredevil

 

[haha101]

http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_s11_qp_23.pdf
can someone please sketch this
6(b) and c(iv) some one please
daredevil

the phase difference will be 90 degree . so the crest of the drawn wave will be on40 instead of 20 . and so the whole wave will shift .

 

[sma786]

because 1m is the total length and the part of the length they are taking is 0.9 as u know R is directly proportional to length.
and then the resistance of the total length is 4 ohm they multiply by 4.
if u don't get it this way then use the ratio method: -

0.9 : x

1 : 4

cross multiply and u willl get (0.9/1) * 4

Thnkss

 

[daredevil]

http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_s11_qp_23.pdf
can someone please sketch this
6(b) and c(iv) some one please
daredevil

sorry man i just saw ur post... its like haha101 said just shift the whole wave forward for 20 cm and keep all the other stuff same

 

[Rvzie]

uncertainity calculation system pls? :/

 

[ShOlO]

Question 5 in june 2012 variant 62 ... Can someone please post a photo of the drawing !

 

[ZainH]

yeah... its constructive interference at the blue part and destructive at the red part.
but hre's a tip. in the paper draw the destructive interference exactly between two constructives.. that way u know its exactly in the middle becz only the exact middle will give the dark fringe

Ah okay all right lol

 

[hela]

When do we talk about the brightness of the fringes and when do we not talk about the brightness ?? few minutes remaining before exam please p21 ... !

 

[hela]

Please answer this question quickly i have a few minutes before my exam P21

What happens to the bright and dark fringes when one slit is covered?
what happens when the source is moved away?
when do I know if i have to talk about the intensity or the brightness of fringes?
THANK YOU SO MUCH

 

[2345qwer]

Please answer this question quickly i have a few minutes before my exam P21

What happens to the bright and dark fringes when one slit is covered?
what happens when the source is moved away?
when do I know if i have to talk about the intensity or the brightness of fringes?
THANK YOU SO MUCH

If there are 2 slits and when one slit is covered ,no fringes are seen only a beam of light is seen (diffracted light).
If the source is moved away the spacing between the fringes increases but the fringes become dull.
I am sorry i didnt get the last part!!

 

[goodluckayesha]

does any one have compiled notes for phy 31 that limitations of procedures and all the 8 mark question in phy practical ppr if any1 has plz upload it

 

[A star]

for 34 as well pls

 

[minie23]

does any one have compiled notes for phy 31 that limitations of procedures and all the 8 mark question in phy practical ppr if any1 has plz upload it

go through the mark schemes !

 

[goodluckayesha]

go through the mark schemes !

searching but ive no time

 

[TaffsAsLevel]

Any one here discusses A2 physics? I don't get the magnetic field part 6 (a) June 2006.

 

[SalmanslK]

Any one here discusses A2 physics? I don't get the magnetic field part 6 (a) June 2006.

June 06 Q6

(a) (i) use right hand grip rule for wire XY to check for the direction field around Y. that is Anti clockwise !
(ii) using Fleming's left hand rule..draw the force that would be a horizontal arrow in the direction Q to Y. Q -----> Y

 

[TaffsAsLevel]

June 06 Q6

(a) (i) use right hand grip rule for wire XY to check for the direction field around Y. that is Anti clockwise !
(ii) using Fleming's left hand rule..draw the force that would be a horizontal arrow in the direction Q to Y. Q -----> Y

I did that before for the first one but I wasn't sure because it says draw arrows, so I should be drawing circles now? I know the right hand grip rule, and for the second one is it because the fact that if both wire have current in same direction, then they attract so I assumed that it is a Q to Y.