Physics: Post your doubts here!

[thats_me]

Mj 05 q1b(ii)

 

[blueberryyums]

Thank you so much

 

[Jaf]

http://papers.xtremepapers.com/CIE/...and AS Level/Physics (9702)/9702_w05_qp_4.pdf
Question 5)b)ii)
If we increase the p.d., the velocity of the particle electron will decrease. By F=Bqv, the force acting on the particle should also decrease and hence the deflection of the electron should be smaller. The mark scheme states the opposite. Can anyone help explain why?
The next part we are increasing the magnetic field strength so B increases and hence so does force therefore larger deflection. This is what the mark scheme states too. Why the discrepancy? Am I missing something?
Soldier313 ?

 

[gary221]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w05_qp_4.pdf
Question 5)b)ii)

the equation given is 1/2mv^2 = qV
where q = charge and m = mass are constants
So, according to this eqn, velocity and pd are directly proportional
decreasing the pd will decrease the velocity as well.
So, deflection will be gr8r.

hope u gt it!

 

[ahmed abdulla]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s03_qp_1.pdf
q22 and 35 plz ?? i alwayas make mistake here

 

[mizmoody]

Physics application . How do we convert binary into decimal? Please help!

 

[Soulgamer]

http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_w11_qp_41.pdf

Question 7 (a) and (c)
Help will be highly appreciated.

 

[sumaiyarox:)]

awesome notes

 

[Dug]

awesome notes

Ikr! Pray for the author if they help you!

 

[sumaiyarox:)]

Ikr! Pray for the author if they help you!

yes IA

 

[gary221]

Physics application . How do we convert binary into decimal? Please help!

what model of calculator do u have?
in fx-991ES PLUS ---> http://usih.merchantrunglobal.com/I...12394&ImageID=122&DisplaySize=-1&ListingID=45

u do it like this ---> http://www.youtube.com/watch?feature=player_detailpage&v=3x01Mc5DiFA
hope that helped!

 

[Soulgamer]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w11_qp_41.pdf

Question 7 (a) and (c)
Help will be highly appreciated.

Anyone? :O

 

[nishan2052]

plz someone explain use of base station at both ideal and active time of cell phones?

 

[Lyfroker]

can some1 plz explain me the following:
q# 5, 12, 21 and 36
http://papers.xtremepapers.com/CIE/...and AS Level/Physics (9702)/9702_w05_qp_1.pdf

 

[biba]

Anyone? :O

7 a : each line in the spectrum of hydrogen corresponds to a specific photon,if an electron comes down to a lower energy level from a higher energy level, a photon is emitted,it can be deduced that the energy changes are discrete therefore the electron energy levels in atoms is also discrete.
i am confused with part c

 

[Lyfroker]

explain the following please
q# 7, 9, 25, 29 and 36
http://papers.xtremepapers.com/CIE/...and AS Level/Physics (9702)/9702_s05_qp_1.pdf

 

[Prince77]

AsA
please HELP!! explain the following : http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_w10_qp_42.pdf
Q1 b (ii) & (iii)
Q2 b (ii) & (iii)
and Q5 (a) !!

 

[xhizors]

Q9b(i) graph part ms says square graph.. ?
http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_w12_qp_42.pdf
http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_w12_ms_42.pdf

 

[xhizors]

AsA
please HELP!! explain the following : http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w10_qp_42.pdf
Q1 b (ii) & (iii)
Q2 b (ii) & (iii)
and Q5 (a) !!

where are b(ii) and (iii)

in Q2b (ii)
WorkDone = Pressure x Change in volume
for Q2(iii)
internal energy = (heat supplied) + workdone
for P-Q u find wd in part1
so just add
for Q-R workdone = 0 so U= 720
for R-P
u know sum of all IE are 0
now calc third IE
put in formula IE = q + WD
and get the wd

For 5a
apply flemings left hand rule
u'll get into the plane!!

hope this helps

 

[AlishaK]

http://www.youtube.com/user/DoctorCambridge?feature=watch
This looks pretty Helpful. So, thought to share withya awwl!
Jazak Allah khair. Stay blessed! :')