AS Physics P1 MCQs Preparation Thread.

[Capricedcapri]

mcq 26 of oct nov 2010 v 12??

 

[fathimaash]

mcq 26 of oct nov 2010 v 12??

k use v=f*lamda
so f= 3*10^8 / (15*2/1000) = 10GHz

 

[Soldier313]

the ans is c.no resultant force is acting.as it is moving frm positive to negative so it will be anticlockwise

erm yea i want a detail explanation.... just dnt gt it

 

[Soldier313]

well , d positve charge is replled by a force awzy frm + terminal, da same 4 da - charge , whch will be replld by da same force, frm - terminal so equal magnitude, forces in opposte direction, zero resulatnt, if u conside da torque, da - charge attracts up while + charge down so anticlockwise.. hope u understand

alhamdulillah i id understand...thanx soo much!

 

[Capricedcapri]

erm yea i want a detail explanation.... just dnt gt it

well , d positve charge is replled by a force awzy frm + terminal, da same 4 da - charge , whch will be replld by da same force, frm - terminal so equal magnitude, forces in opposte direction, zero resulatnt, if u conside da torque, da - charge attracts up while + charge down so anticlockwise.. hope u understand

got this detail from abdullah ash.......hope u get it...........

 

[Soldier313]

k use v=f*lamda
so f= 3*10^8 / (15*2/1000) = 10GHz

bt y do we use 15? isnt 15 half of the wavelength??

 

[fathimaash]

alhamdulillah i id understand...thanx soo much!

ur welcum add me in ur prayers......

 

[Soldier313]

well , d positve charge is replled by a force awzy frm + terminal, da same 4 da - charge , whch will be replld by da same force, frm - terminal so equal magnitude, forces in opposte direction, zero resulatnt, if u conside da torque, da - charge attracts up while + charge down so anticlockwise.. hope u understand

got this detail from abdullah ash.......hope u get it...........

yea i did thanx

 

[Soldier313]

ur welcum add me in ur prayers......

definitely...u too please

 

[Capricedcapri]

bt y do we use 15? isnt 15 half of the wavelength??

i guess in minima and maxima we always double the distance...........

 

[fathimaash]

bt y do we use 15? isnt 15 half of the wavelength??

ya 15 is half dat y i hv multiplyd 15*2 in my answer

 

[fathimaash]

i guess in minima and maxima we always double the distance...........

yes u got it.......

 

[fathimaash]

definitely...u too please

inshaallah yes

 

[Soldier313]

Would someone be kind enough to help me in June 10 variant 2 question 34. (I know this has been asked hundreds of times before but I can't find the sol. now).
Also, Nov 09 variant 2 question 18.

part 1 i dont know
part 2
use formula pressure = density x gravity x height
so density = 15200/ (9.81 x 0.8)
1936 kg/m^-3
B is the ans

 

[Capricedcapri]

yes u got it.......

thanks man for pulling up my socks..........

 

[fathimaash]

any more gotta go........
all d best guys......... Allah will help us AMEEN!!!!

 

[Soldier313]

any more gotta go........
all d best guys......... Allah will help us AMEEN!!!!

can u pls help me with path difference before u go?

 

[fathimaash]

can u pls help me with path difference before u go?View attachment 13014

im sry i think i need help in dis tooooo

 

[Soldier313]

Would someone be kind enough to help me in June 10 variant 2 question 34. (I know this has been asked hundreds of times before but I can't find the sol. now).
Also, Nov 09 variant 2 question 18.

okay... i kinda figured hw to do qn 1
i dont know if its the right way
since they have said the resistances r equal, i gave all the resistors a value of 4 ohms ( just to make things easier )
then i calculated resistance , total resistance would equal 6 ohms , since 4 ohms of P added to 2 ohms (Q and R are in parallel)
kay so then i did
12W = 6 ohms
? = 2 ohms
i got 4 W
i divided this by 2 since the power will be split btwn Q and R each getting 2W so i believe answer is A

 

[Soldier313]

im sry i think i need help in dis tooooo

owh okay no p