physics paper..

[D0cEngi]

The ppr was hell easy.....I wrote focal length......

 

[MoFlurry]

I wrote something related Trignometry on that question that, you've first have to measure the distance between the image point and the point on which line S was meeting the white card...... then measure the angle of the image point on the white card then use the tan of the given values :%)

Line S = Focal lenght... thats what I wrote

 

[workaholic]

Focal length it was!!! :Yahoo!:
For the part about how to determine it accurately i wrote that one cud use a set square as a fiducial aid to avoid parallax error with the help of a diagram. I wrote that for an accurate value of s the dist between the lens and the screen shud be such that the image formed is the sharpest. Hope to get atleast 2 marks for my ans....

 

[Muhammad Talha]

What did u write in the ques regarding experimental techniques of the rays one ???

 

[basimnazir]

What the hell you guys discussing? :shock: Were you guys 62?

 

[mujtabashahnawaz]

Paper was way easy!!! and that was focal length...

Wish einstien was not born :evil:

 

[Joker101]

yup 62

 

[Usman17]

wat 62?

 

[Usman17]

It was 42 i guess...

 

[basimnazir]

42?? Dude!! Paper 6 and variant 2

 

[Soulgamer]

In Physics, paper 4 is ATP....i think your talking about 42(2nd varient) right?

 

[sksuriza]

..?

 

[123456A]

ya my paper went so good as it was so eazy

 

[Usman17]

No it was paper 4 varient 2..!

 

[tanseer]

i wrote focal length..n underdog1234 i wrote bout ruler n parallax error too..plus drew a diagram..
that shud gain 2 marks but for the last mark um not sure :S
i wrote that different light sources shud b used to obtain an average for focal length
n the lens shud b perfectly horizontal during experiment..does that make sense ?

I also wrote focal length and explained the same thing ( except for parallex error) + drew a diagram of metre rule, parallel rays, lense and white card....
but my metre rule was not drawn to scale.... would I get full marks ??
and in the second last part I mentioned two things:
-other factors should be same for both, and
-same type of thermometer should be used........ CORRECT ??