Physics Paper 5 tips

[nishan2052]

Got your question!!!!!!!!!!!
Error in T=(error in t/t)xT (10 is constant so has no error)
For error of T^2=(2(error in T/T))xT^2

please see ms. ans is really confusing. it seems error is divided by 10.

 

[fb.junks]

please see ms. ans is really confusing. it seems error is divided by 10.

Did u even try doing it????
I got answer correct by this way and verified by marking scheme.Constant dont contribute in the errors.

 

[saifookhan]

http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_s12_qp_51.pdf
http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_s12_ms_51.pdf
Q1. How do we change the speed of the rotating device?

Fan has a motor. How do you change it's speed?
Use a variable resistor.

 

[fb.junks]

Fan has a motor. How do you change it's speed?
Use a variable resistor.

Yes or u can change the setting on the fan.

 

[nishan2052]

Did u even try doing it????
I got answer correct by this way and verified by marking scheme.Constant dont contribute in the errors.

lets take t= 50 +- 0.2
error is 4%
and see dude using ur idea T = 0.5+-0.2 where error is 40%.hence idea doesnot matches. if we divide error by 10 we get same %error.it make my point more stronger.isnt it?

 

[pearl angel]

Assalamoalaikum
can anyone plz tell me how to find the absolute uncertainties in Q2b
http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_s10_qp_51.pdf

 

[Soldier313]

Assalamoalaikum
can anyone plz tell me how to find the absolute uncertainties in Q2b
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s10_qp_51.pdf

Xc = V0 / I0
So, (Error in Xc) / Xc = [ (Error in V0) / V0 ] + [ (Error in I0) / I0 ]

eg for first row:
Error in Xc = { [ 0.2/5 ] + [ (0.2x10^-3) / (15 x 10^-3) ] } x 330
Error in Xc = 18

Hope that helped

 

[pearl angel]

Xc = V0 / I0
So, (Error in Xc) / Xc = [ (Error in V0) / V0 ] + [ (Error in I0) / I0 ]

eg for first row:
Error in Xc = { [ 0.2/5 ] + [ (0.2x10^-3) / (15 x 10^-3) ] } x 330
Error in Xc = 18

Hope that helped

thanx alot
can u also plz tell me how to do Q2 e
http://papers.xtremepapers.com/CIE/...and AS Level/Physics (9702)/9702_s08_qp_5.pdf

 

[Soldier313]

thanx alot
can u also plz tell me how to do Q2 e
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s08_qp_5.pdf

It's been answered in these 2 posts:

https://www.xtremepapers.com/community/threads/solved-physics-paper-5.27095/page-14#post-596930
https://www.xtremepapers.com/community/threads/solved-physics-paper-5.27095/page-16#post-598167

Hope it helps

 

[pearl angel]

It's been answered in these 2 posts:

https://www.xtremepapers.com/community/threads/solved-physics-paper-5.27095/page-14#post-596930
https://www.xtremepapers.com/community/threads/solved-physics-paper-5.27095/page-16#post-598167

Hope it helps

it did help thanku so much

 

[pearl angel]

It's been answered in these 2 posts:

https://www.xtremepapers.com/community/threads/solved-physics-paper-5.27095/page-14#post-596930
https://www.xtremepapers.com/community/threads/solved-physics-paper-5.27095/page-16#post-598167

Hope it helps

can u plz tell me your answer for Q2 c (3)
http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_s10_qp_51.pdf

 

[Soldier313]

can u plz tell me your answer for Q2 c (3)
http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_s10_qp_51.pdf

(72.5 + / - 6.25 ) x 10 ^3

 

[pearl angel]

(72.5 + / - 6.25 ) x 10 ^3

im getting (73.8 +/-10.7)*10^3

 

[SomeStudent]

What can be possible errors and or improvements in experiments dealing with Time period?

 

[SomeStudent]

Wasnot there a thread around here somewhere where people uploaded solved P5s and others gave feedback on them?
If yes, link please?

 

[daredevil]

here you go A star
Maira Siddique

 

[A star]

http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_s10_qp_51.pdf Q2c

 

[Yousif Mukkhtar]

Guys, can some one explain how a light gate works? Like for example is the right method:
When a rotating object connected by a rod to a pole, and we are measuring the time taken for one complete oscillation. A light gate is used. In order for this to work, the object passes through the light gate once, time t1 is noted. And when it completes one other oscillation time t2 is noted. So the time taken for one oscillation is t2-t1?

 

[itallion stallion]

What to write in time base calculation of a cro!

 

[Champ101]

Hey guys how to keep current constant in a circuit??? any idea?