Unit 2 Physics notes!!

[xainer]

Can someone explain june 2009 last qustn (c) part 2???

 

[xainer]

these are my guess! if im not correct, please correct me!

answer for Q4 is B
UV ray freq is higher(10^15) than that of visible light(10^14)!
according to equation E=hf, energy of UV is high!
so it is from energy level 4 to 1!

the answer for
Q5 is D!
the current in (L+M) will be = to N!
because (L+M) is parallel and N is in series!
so when M is removed,
some of the current will move from N to L!
for example, consider:
L = 2A
M = 2A
N = 4A
when M breaks,
L will gain 1A from N,
making L = 3A & N = 3A
so, this increases brightness of Lamp L and decreases brightness of Lamp N

The answers are correct and yeah I think the explanations makes sense now..okay thanks a lot for the explanation!

 

[xainer]

err I don't have the paper and I can't find it on the papers section, so if you post the question or give me a link I can try... ?

It's okay..got the answer now!!

 

[St0cK]

Can someone explain june 2009 last qustn (c) part 2???

since they said R is directly proportional to l^2
then R=((2.51^2/2.5^2)*0.22)
then the answer you get - 0.22 because they want the increase in resistance...
so change in R is 1.76*10^-3

 

[bilquees]

how to get frequency in question no 6 in jan 2013?

 

[bilquees]

In jan 2013,question no 15 ,two resistors are parallel thn y do we hve to add all resistance to get totall resistance?

 

[maths maldives]

how to get frequency in question no 6 in jan 2013?

for that the answer is C
first convert 5ms to seconds by dividing it over 1000!
that is 0.005!
then multiply it by 4, because it have four squares for 1 wavelength!
that is 0.02!
then use F=1/T
so 1/0.02 is 50Hz
thats it!

 

[maths maldives]

In jan 2013,question no 15 ,two resistors are parallel thn y do we hve to add all resistance to get totall resistance?

for that question, look carefully!
all resistors are in series!
so we have to add all

 

[maths maldives]

The answers are correct and yeah I think the explanations makes sense now..okay thanks a lot for the explanation!

welcome
btw are you really from maldives?

 

[solidfire]

F physics its an impossible subject with alot of stupid questions that Einstein cant do

 

[bilquees]

thanks

for that the answer is C
first convert 5ms to seconds by dividing it over 1000!
that is 0.005!
then multiply it by 4, because it have four squares for 1 wavelength!
that is 0.02!
then use F=1/T
so 1/0.02 is 50Hz
thats it!

 

[jtbteddy]

Brief notes .. based on mark sschemes

 

[Hamzeh S]

is line spectrum the absorption or emission spectrum?

 

[Bassem]

F physics its an impossible subject with alot of stupid questions that Einstein cant do

hahahahaahahahahaahahahah yes u r right

 

[xainer]

welcome
btw are you really from maldives?

yeah

 

[xainer]

since they said R is directly proportional to l^2
then R=((2.51^2/2.5^2)*0.22)
then the answer you get - 0.22 because they want the increase in resistance...
so change in R is 1.76*10^-3

Oh..I see..thanks!!

 

[muji moto]

hey guys from where do u get the mrk schemes from??? i want for chem phy and bio u1 and u3s for june 13

just go to edexcel.com and select papers ull get most of them except the 2013

 

[aligatorviper]

dude i wanted the 2013 one.....
btw thnnxx

 

[aligatorviper]

finallyyy the ppr is over.....so hw wzz the exam!!!!!!!!
i felt it was easyyy...just the last part of last q. n the polarization was somethingg confusinggg!!!!!

 

[Ayesha B]

I thought it was SO good until I discussed the answers. mehuahah :'(