Physics MCQs thread.

[DeathDealer]

Yaaawr wot about Ques 33 ?
U answerd Q:9 thanx mate buh yo didnt answerd 33rd !

 

[diwash]

Hey.......cn any1 explain dm plzzzzzz itx june 06

http://www.xtremepapers.me/CIE/Internat ... 6_qp_1.pdf

Ques 9 & 33

Some one has already answered Qno9 ...so Fro Q no 33 now..

First of all the collection is parallel so the pd across (500 ohm and 1000 ohm ) and (1000 ohm and 2000 ohm) is equal.
so for 500 ohm and 1000 ohm conncetion..
total R = 1500 ohm ...
so I = 12/1500.....= 0.008 A
so across 500 ohm resistor.
v = I R....
V = 0.008 *500....4v(point X)

Similarly,
for 2000 ohm and 1000 ohm conncetion..
total R = 3000 ohm ...
so I = 12/3000.....= 0.004 A
so across 2000 ohm resistor.
v = I R....
V = 0.004 *2000....8v (point y)

finally..Pd at X is 4V and pd at y is 8V...so the Pd between X and Y is 8-4 =4V

 

[beststriker]

Hey.......cn any1 explain dm plzzzzzz itx june 06

http://www.xtremepapers.me/CIE/Internat ... 6_qp_1.pdf

Ques 9 & 33

for q33, u can use potential divider method too.
(500/1500) x 12V = 4V
(2000/3000)x12V = 8V

>> p.d = 8-4 = 4V

 

[beststriker]

can anyone explain nov10/12 q7..

 

[cocospaniel]

May/june 2009, q27, can someone explain why it's A :fool:

 

[diwash]

Ques 21........y v add both pressure ov liquid n oil ?
Explain plzzzzzz

http://www.xtremepapers.me/CIE/Internat ... 6_qp_1.pdf

Look at the Q Carefully there is quote at the bottom...so Pressue at the bottom = Pressure due to oli + presure due to wter

 

[cocospaniel]

Nevermind, i found out why

 

[Zizu1992]

Please Explain Question 10.
http://www.xtremepapers.me/CIE/Internat ... 9_qp_1.pdf

 

[cocospaniel]

Since body was stationary before, therefore:

0 = .5mvx^2 - .5(2m)vy^2

mvy^2 = 0.5mvx^2

so m/0.5m = vx^2/vy^2

So X/Y = 2/1

 

[rabib2013]

alright, this one, anyone?

answer is D.. :S

 

[cocospaniel]

D - X-Ray, go here to this website, at the bottom of the page it gives you all t he frequencies and wavelengths http://en.wikibooks.org/wiki/A-level_Ph ... _a_wave%3F

 

[libra94]

alright, this one, anyone?

answer is D.. :S

well u hav to memorize all the frequencies and wavelengths of the electromagnetic spectrum

 

[XXXDARKNESSXXXX]

help plz

 

[XXXDARKNESSXXXX]

this one 2!

 

[RafaySid]

help plz

μ = 10^-6
G = 10^9
Therefore (10^-6)/(10^9)
= 10^-15, D is the ans.

 

[libra94]

this one 2!

u know the speed is ms^-1
so try option A
sqaure root of g and lambda
g=ms-2
lambda=m
so it'll be m^2 s^-2
when u take the square root of it, u'll get ms-1
which is same as the speed

 

[ninjas4life]

how do you do this one?

 

[XXXDARKNESSXXXX]

how to solve this one?

 

[RafaySid]

how do you do this one?

Ans is D. Do your math and get the total to +1 (the charge of a proton).
2/3 x 2 - 1/3 = +1

 

[ninjas4life]