Physics MCQs thread.

[Zishi]

zishu=i its 1.1

No, it's 2.2. 1.1 is wrong, hassam.

 

[aliya_zad]

aliya in a similar question of 2003....my anser agreed with ns using same logic which i used here

is it the 10th question, Im doin it nw and iv got the ans according to my logic coz the question's diffrent u c...
Dunno if tz the same thing

 

[aliya_zad]

Hw do u solve dis, i keep getting the ans as 4 bt itz 16...

 

[hassam]

zishii.......chek question 20 shudnt it be B

 

[farrukh]

force exerted by block y on block x equals the force exerted by block x on block y...

Total acceleration of blocks is F/(3M)...

Force exerted by x on y is F=ma
F=2M(F/3m)
=2F/3

 

[hassam]

 

[Hateexams93]

CAN some1 explain this properly ?

 

[farrukh]

i'm getting the answer as Ea/49

 

[farrukh]

CAN some1 explain this properly ?

take momments about the point at at which ladder is in conctact with wall

Sum of clockwise = Sum of anticlockwise
Wa + Fh = W*2a

so ans is A

 

[hassam]

Ea/49

 

[MrMimeXp]

Can anyone please explain Question 12 and Question 22? http://www.xtremepapers.me/CIE/Internat ... 2_qp_1.pdf
Please explain.

 

[nidzzz09]

And another one


A projectile is launched at 45° to the horizontal with initial kinetic energy E.
Assuming air resistance to be negligible, what will be the kinetic energy of the projectile when it
reaches its highest point?
A 0.50 E
B 0.71 E
C 0.87 E
D E


2 A steel string on an electric guitar has the following properties.
diameter = 5.0 × 10^–4m
Young modulus = 2.0 × 10^11Pa
tension = 20 N
The string snaps, and contracts elastically.
By what percentage does a length l of a piece of the string contract?
A 5.1 × 10^–4%
B 5.1 × 10^–2%
C 1.3 × 10^–4%
D 1.3 × 10^–2 %



A parallel beam of light of wavelength 450 nm falls normally on a diffraction grating which has
300 lines /mm.
What is the total number of transmitted maxima?
A 7
B 8
C 14
D 1




I know the Answers but i wanna Know hw do yu get them
Pls Show the workin



THANKS

 

[nidzzz09]

Can anyone please explain Question 12 and Question 22? http://www.xtremepapers.me/CIE/Internat ... 2_qp_1.pdf
Please explain.

Give me some tmme

 

[Zishi]

zishii.......chek question 20 shudnt it be B

Page number?

 

[ShootingStar]

Answer is D....please explain

 

[Zishi]

No, it should be D.

 

[hassam]

howw

 

[abdullah181994]

plz explain :%)

 

[MrMimeXp]

I ASKED A QUESTION!

 

[ShootingStar]

plz explain :%)

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