Physics MCQs thread.

[histephenson007]

http://www.xtremepapers.me/CIE/International%20A%20And%20AS%20Level/9702%20-%20Physics/9702_w09_qp_11.pdf

Ques 27 wd REASON ?
Any1 !

help plzzz...

 

[kirashinagami]

urgent help before i sleep!

 

[ambitious1]

May/June 2009 01 Q. 14 & 15 pleaasee

 

[Octahedral]

Please can someone EXPLAIN this?

 

[histephenson007]

urgent help before i sleep!

The total work done is the area under the graph.
you can divide the graph into 2 parts : the triangle and the trapezoid
then u just do some basic math...

 

[arlery]

urgent help before i sleep!

Area of triangle is 0.5 x 500 x 10 x 10^-3
=2.5

Area of trapezium is 0.5 x (500 + 550) x 2 x 10^-3)
=1.05

Add them both and you get 3.55 J

 

[DeathDealer]

http://www.xtremepapers.me/CIE/Internat ... _qp_11.pdf

YAAAAAAAAAAAAWWR Q-27 ? any1 plzzzzzzz let meh no y it cant be B ?

 

[cocospaniel]

May/June 2009 01 Q. 14 & 15 pleaasee

14 - Power = Work Done / Time taken (work done = Fd)
P= Fd/t (d/t=v)
P=Fv (F=kv^2) Therefore P= kv^2 * v = kv^3
So Rearraging k= P/v^3


15 - Potential energy = mgh. When PE is equal for both, h is halved and mass is halved. g is constant.

so PE= m/2 * h/2 * g = mgh/4

 

[arlery]

http://www.xtremepapers.me/CIE/International%20A%20And%20AS%20Level/9702%20-%20Physics/9702_w09_qp_11.pdf

Ques 27 wd REASON ?
Any1 !

help plzzz...

because in E = F/Q we always use the charge of the particle 1.6 x 10^-19

 

[histephenson007]

Please can someone EXPLAIN this?

All the wires are in parallel. So you just have to find their combined resistance...
R(tot) = [(6/10)+(1/100)] ^ -1
=1.6

 

[libra94]

urgent help before i sleep!

find the area of the triange and the trapizuim and add them
make sure all of them are in SI units

 

[DeathDealer]

http://www.xtremepapers.me/CIE/Internat ... _qp_11.pdf

Azwel az QUESTION 17 REASON plzzzzzzzzzzzzzzzz ?

 

[histephenson007]

http://www.xtremepapers.me/CIE/International%20A%20And%20AS%20Level/9702%20-%20Physics/9702_w09_qp_11.pdf

Ques 27 wd REASON ?
Any1 !

help plzzz...

It will be A because since both particles are deflected downwards, it means that they are attracted towards plate Q. Since negatively charged particles are attracted towards positive plates. Hence it is A.

I don't get it...

 

[cocospaniel]

Please can someone EXPLAIN this?

Since all the wires are in parallel. So (6 x 1/10) +1/100
= 1.6 ohms This is arlery who worte this, I just copied and pasted it.

 

[Zizu1992]

http://www.xtremepapers.me/CIE/Internat ... 9_qp_1.pdf
Please explain Question 19. I really dont get it.

 

[arlery]

@histephenson007


I'm sorry I explained the wrong question, I've edited the post now.

 

[DeathDealer]

http://www.xtremepapers.me/CIE/Internat ... _qp_11.pdf

Q : 17

 

[histephenson007]

@histephenson007


I'm sorry I explained the wrong question, I've edited the post now.

ThanQ

 

[arlery]

http://www.xtremepapers.me/CIE/International%20A%20And%20AS%20Level/9702%20-%20Physics/9702_s09_qp_1.pdf
Please explain Question 19. I really dont get it.

You need to learn the properties of different materials for that.

This might help:

http://simple.wikipedia.org/wiki/Deformation

 

[cocospaniel]

http://www.xtremepapers.me/CIE/International%20A%20And%20AS%20Level/9702%20-%20Physics/9702_w09_qp_11.pdf

Q : 17

It's C, kinetic energy is the same. Potential energy is not. So it can't be A, or B or D.