IGCSE/GCSE/O & A Level/IB/University Student Forum

Qualification => Subject Doubts => GCE AS & A2 Level => Sciences => Topic started by: BurstBullet on April 21, 2010, 11:00:37 am

Title: AS Physics (CIE) P2
Post by: BurstBullet on April 21, 2010, 11:00:37 am

Hey guys!

I'm having trouble with Question no. 8 in June 2002/ P2 & no. 6 in Nov. 2002 / Paper 2

M/J 2002: Q8

I need help in part (a) iii
------

O/N 2002: Q6

I managed to solve everything but part C.

----

To calculate the force on the electron, I used F=EQ.

F= 5x1.6x10^-19

But in the mark scheme it was :

5x10⁴x1.6x10^-19


I don't understand where the 10⁴ came from.


Thanks in advance!

Title: Re: AS Physics (CIE) P2
Post by: nid404 on April 21, 2010, 11:19:22 am

10 min

Title: Re: AS Physics (CIE) P2
Post by: nid404 on April 21, 2010, 11:52:05 am

Nov 02 Q6

E=V/d
d is in cm...u have to convert it to standard unit m first..
E=400/0.8X10^-2=5X10⁴ Vm^-1

June 02 Q8

1/400 +1/400....x X =1/40
X/400=1/40
X=10
 
OR

1/200 x X=1/40
X=5

 
U can figure out any such combination
 i could come up with these
look at the diagram to see how you would represent it