As physics p1 MCQS YEARLY ONLY.

[applepie1996]

thanks a lot but I am extremely srry to say that my paper was varient 2 and 1...I suddenly realised when I went to check my answers....the questions r same in varient 1 but their order was one number back..i.e if i had mentioned question 3 was my doubt, that was question number 2 for varient 2.....if u have time, can u xplain them to me??! i know its my mistake....srry again

Q35)itz quiet simple find resistance of the first part=1.5 ohms find resistance of 2nd part 2ohms u get 3.5 ohms

 

[Rakayz]

Q35)itz quiet simple find resistance of the first part=1.5 ohms find resistance of 2nd part 2ohms u get 3.5 ohms

thanks a lot!!
for question no. 35) i am still getting the answer as 1.2 ohms..i know its very simply just add the resisters parallely in the two loops and finally add them
this is what i did in first loop:
1/3 + 1/3 = 2/3 -------> first loop
1/6 + 1/6 + 1/6 = 1/2 -------> second loop

when u add them u get 7/6
pls check if sumthing is wrong in this....
JAZAK ALLAH

 

[applepie1996]

thanks a lot!!
for question no. 35) i am still getting the answer as 1.2 ohms..i know its very simply just add the resisters parallely in the two loops and finally add them
this is what i did in first loop:
1/3 + 1/3 = 2/3 -------> first loop
1/6 + 1/6 + 1/6 = 1/2 -------> second loop

when u add them u get 7/6
pls check if sumthing is wrong in this....
JAZAK ALLAH

the formula is 1/R=1/R1+1/R2..........................
this is the mistake evryone does now since the formula starts with 1/R u shuld alwayz take the reciprocal of ur answer
so 3/2 + 2=3.5

 

[Rakayz]

the formula is 1/R=1/R1+1/R2..........................
this is the mistake evryone does now since the formula starts with 1/R u shuld alwayz take the reciprocal of ur answer
so 3/2 + 2=3.5

AHA! thanks that was a very silly mistake....i never noticed that

 

[applepie1996]

AHA! thanks that was a very silly mistake....i never noticed that

i knew u did sumthin silly lyk

 

[Rakayz]

i knew u did sumthin silly lyk

hope i dont do this in the exam.....i remember sum silly mistakes in p2...it made me fell terrible but ALHAMDULILLAH overall it was good

 

[applepie1996]

hope i dont do this in the exam.....i remember sum silly mistakes in p2...it made me fell terrible but ALHAMDULILLAH overall it was good

good for u

 

[Rakayz]

Finally...NOV 2011 variant 1

1: D...basic stuff
2: B.. ke is 0.5 m v^2...100m race can be run with a speed of about 10ms-1 so 0.5 x 80 x 10^2 = 4000..or any number which is in the thousands
3: C..basic stuff
4: B...lets try having P to be m^2 substitute in the equation..it will be m ( 3+ ( m^2/m^2) = Q x s^2 so Q = ms-2
5: B...simple questoin..just substitute the values in the equation..and try with the uncertanities..ex..when u put F..put it 19.63 then 19.61..ull find that d causes the largest change
6: A...it was having an increase in velocity..then terminal velocity..then after it collided with the ball INELASTICALLY, it moved in the opposite direction so V must be -ve and constant with a value less than the one before collision..then as it goes up the inclined plane..v starts to decrease uniformly till it reaches zero..so A..because as the ball lost KE after the collision, v decreased so more time is needed to reach the plane
7: D..with air resistance..resultant force becomes zero means that a will start 2 decrease it reaches zero so D
8: B...the vertical component of a is always 9.81..he said in the quest that up is +ve..and we know that a will be +ve down so it will be -ve when going up
9: B..mass hape and density of the air affects the velocity so B
10: C...must be memorized
11: A..basic stuff
12: A..he said inelastic sollision..the momentum is constant until the collisoin occurs, then it decreases to the negative value as the hockey goes to the opposite direction
13: A...basic equillibrium triangle rule, B and C aewrong because Q and p will meet and D is wrong all te forces are made the opposite way
14: C..torque is F x perpendicular distance between the 2 forces..using the equation opp/hyp = sin theta.......so opp = 0.3sin(50) = 0.23 so 2 x 0.23 = 0.46
15: C...one ring of mass m is 7 scales away from the pivot...and 2 rings of mass 2m is 5 scales away from the pivot..so this means that 2 x 5 is 10...and the other ring is 7 scals away so 10 - 7 = 3 ..so the new ring must be 3 scales away from the pivot so 5
16: C.....m1u1 + m2u2 = ( m1 + m2) v so Y is satationary so u = o so , mu/2m = v so v is 1/2 so the kinetic energy is also halfed so C
17: A...how work is done against gravity when ur falling???
18: B...Work done = ( Final mechanicl energy - initial mechanical energy) so W.D = ( Final K.E + Final PE) - ( initil KE + Initial PE) so wrok is done against friction so -10KJ and Q is 50KJ less than P so -10 = ( KE + [P - 50]) - ( 5 KJ + P) continue and ull get KE as 45KJ
19: C...efficiency = useful output power / TOTAL input power so 80% = 120 / X so X is 120 / 80% = 150 then the heat loss is 150 - 120 = 30
20: E= F x d = ma x d so a = E/m x d and the dirction is to the right as it loses PE and so gains Pe and so increasing the velocity so A
21: basic stuff
22: again basic stuff
23: B..he said same type of material so same young modulus
24: B..area under Force - extension graph is the energy stored in the material
25: C...F = kx
26: using the young modulus equation, Fl/Ae..F is inverselyproportional to l so B
27: basic stuff
28: D..covering one of the slits decreases the amplitude by half..amplitude^2 = Intensity so I decreases by 4
29: A..stationary wave can be formed in a closed or an open pipe
30: C...constant phase difference in the line Rs so no interference
31: A.....E=v/d = 50 / 5 x 10^-3 so 10000 and from +ve to -ve is from up to down
32: C....the resultant force is obviously zero..the resultant torque is anticlockwise because the -ve point charge will be attracted to the +ve one from right to left
33: B....R = pl/A so p = RA / l..in A C & D he didnt say the three quantities needed to get the reistivity..while in B..he did mention the Area Length and the Resistance
34: D..for A: P = I^2 R so ( Q/t)^2 x r not only Q to be squared so its wrong B: E/ t = Power and P = V^2 / R not V^2 / R^2 so it wrong and C: P= VI not Pt= VI..for D = Q = It so E I / P as E / P = t so It so D is correct
35: A...basic definitions..current is the RATE OF FLOW OF CHARGE
36: B..again basic stuff
37: D..justmentally think about it
38: B...I is inversely proportional to R ..so as R is doubled I is halfed etc...
39: B...V output= ( 5000/ 5000 + 5000) x 9 = 4.5..this is the maximum.. Vout and ofcourse0 is the minimum
40: D..beta is 0 nucleon number and - 1 proton number so when it is emmitted the proton number is increased by 1

thanks bro...MAY ALLAH REWARD U FOR THE HARD WORK AND SUCCEED U IN EVERYTHING.....

 

[murtaza94]

qs 13 jo5 plz tell y did they took 10N force as anticlockwise? :S

 

[applepie1996]

qs 13 jo5 plz tell y did they took 10N force as anticlockwise? :S

Q13) IS 20 x 3 - 5 x 2 - 10 x 2 =30Nm
negative because they move in opposite direction and it is 10N MULTIPLY BY 2m BECAUSE IT MOVES THROUGH A HEIGHT OF 2m

 

[Rakayz]

Q13) IS 20 x 3 - 5 x 2 - 10 x 2 =30Nm
negative because they move in opposite direction and it is 10N MULTIPLY BY 2m BECAUSE IT MOVES THROUGH A HEIGHT OF 2m

till what time u r gonna stay online?!

 

[applepie1996]

till what time u r gonna stay online?!

11.30

 

[Rakayz]

11.30

hhmm and waht time r u gonna cum online tomorrow??!

 

[applepie1996]

hhmm and waht time r u gonna cum online tomorrow??!

DUNNO

 

[Rakayz]

DUNNO

hmm ok i asked coz i am doing nov 10_12...i might finish the paper by 12 and have sum doubts at the end..anyway if there r then i'll ask tomorrow INSHA ALLAH

 

[Rakayz]

DUNNO

can u explain these questions?!
june 10_12: 9, 12, 28, 31, 32, 34
&
nov 10_12: 7, 8, 9, 15, 21, 25, 27

 

[applepie1996]

can u explain these questions?!
june 10_12: 9, 12, 28, 31, 32, 34
&
nov 10_12: 7, 8, 9, 15, 21, 25, 27

2 tired can i do them tommorow please

 

[A.ELWY 7]

thanks bro...MAY ALLAH REWARD U FOR THE HARD WORK AND SUCCEED U IN EVERYTHING.....

welcome and yarab

 

[Rakayz]

2 tired can i do them tommorow please

yeah sure!! get some sleep and refresh urself i thought u were sleeping so i simply posted it now to save time for tomorrow

 

[Rakayz]

welcome and yarab

i feel piety for u coz all the time i have doubts, u just pop up in my mind. So i try to ask my doubts from others coz u already do so much stuff.....anyways thanks for everything and if its possible for u AND u have time, just post june 11 varient 1 & 2
BEST OF LUCK FOR UR EXAMS!!!