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http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_w12_qp_11.pdfwhich question?
http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_w12_qp_11.pdfwhich question?
which question?
Lol, seems like but no.^for the above two MCQs confusion is,
Aren't they contradicting each other?
answer of 30 is C, thats the prob Mj 12 frm 2 diff variants.Lol, seems like but no.
E=V/d .So D increases E decreases in both cases.
what pprs are they from?
The answer to this is C. Electric field strength is *Uniform* between two parallel plates, so from X to Y, the value of E remains same which is shown by graph in option C.
The answer to this is C. Electric field strength is *Uniform* between two parallel plates, so from X to Y, the value of E remains same which is shown by graph in option C.
From what I know, yes it should. E= V/d it is.but increasing the length of XY would decrese E.field na?
From what I know, yes it should. E= V/d it is.
June 2005
=========
thank u sooo much ur a life saver!!!
i dont get question 28 and also plz do november 2002 question 35. Help is appreciated deeplyOK here's all of June 2002.
June 2002
==========
1. B
Fact. A would be right if K was given instead of °C.
2. B
You go FORWARD in the direction of X and BACKWARD in the direction of Y.
3. A
The units of speed (msˉ¹)s are equal on both sides.
4. B
You can eliminate A, C and D because they are all nonsense (in my opinion). B is correct because if the timer was started and THEN the ball thrown, you would get 0
height for some time 't' on the x-axis.
5. C
Uncertainity = 2(0.03) + 0.02 = 0.08 = 7%. You multiply the uncertainty of V twice because of the square.
6. D
Air resistance isn't negligible because the speed eventually becomes constant (terminal velocity), so rule out A and C. The Y-axis can't be distance because it
eventually becomes constant, the distance can't become constant during the fall of a body.
7. A
Acceleration is constant with uniformly increasing speed. B is increasing rate of speed, C is constant speed and D is at rest.
8. D
S is the distance from cliff to highest point. R is the distance from highest point to sea-level. We are looking for the distance of sea-level to cliff, which is R -
S.
9. B
K.E is ALWAYS conserved in elastic collisions, so K.E before impact is 0.5mv² + 0.5mv² = mv². That means after impact, the K.E should also be mv².
10. B
Fnet = ma.
12 - x = 4 * 0.6
x = 9.6 N.
11. B
Momentum is always conserved so forming an equation,
0 = M1V1 + M2(-V2)
M1V1 = M2V2
V1/V2 = M2/M1
12. D
Fact. Upthrust is very small compared to weight. Also, drag is almost as large as weight not they are not the same (weight is a bit larger) so A and B are wrong.
13. C
Torque = 2 * PD
To find the perpendicular distance, find the perpendicular distance from the force to the pivot and then multiply that by 2. To find the distance from the force to
pivot, construct a triangle and obtain the equation x = 0.15 sin 30.
14. C
Upthrust is the pressure of the block (Pb - Pt) * area, I think.
15. D
Resolve the horizontal 3N and vertical 4N force to get a sideways 5N force which is in the same line as the diagonal 4N force. The resultant force has a magnitude of
1N and the direction is towards the upper-right.
16. D
Efficiency = (useful output)/(total input)
17. C
The only work done is reducing the volume, and since the pressure is constant, work done is p(V1 - V2).
18. B
At Q, the potential energy is 50kJ less than P. This means that the 50kJ must have been converted to kinetic energy. So, K.E (Q) = K.E (P) + 50kJ = 55kJ. And 10 was
lost in friction, leaving us with 45 kJ.
19. D
Simple Power = Force * Velocity.
24 * 10³= 600 * V
20. B
Evaporation occurs over a range of temperatures, while the rest only occur at a fixed temperature.
21. A
Total density = total mass / total volume.
The total mass is m1 + m2 = 2m (since they are equal).
The total volume is MD1/MD2. D1 is ρ and D2 is 2ρ, and that gives us the total volume has 3M/2ρ. Then just use the total density formula I wrote above.
22. C.
Stress = F/A
Strain = extension/length
YM = stress/strain.
23. B
Simple ratio stuff with the YM formula FL/Ax.
24. B
Area below a force/extension graph is energy (i.e. work done). In reducing l2 to l1, this part of the graph is MNQP.
25. C
Speed of electromagnetic waves is always constant, but the frequency will decrease because the wavelength increases.
R M I V U X Y
--> increasing frequency
<-- increasing wavelength
26. B
λ = 4cm.
Time period for one wave is therefore 4 * 0.002s = 0.008s.
F = 1/T = 125 Hz.
27. B
Fact. I α a² and I α 1/r².
28. C
Use the path difference formula (distance from one source - distance from other source) to create an equation involving X. S2x - S1X = λ/2. λ/2 because X is a minimum point.
29. D
λ = 2(1.5) = 3m. 2 nodes are 0.5λ apart.
v = fλ
v = 300(3) = 900.
30. B
Graph X - Diode
Graph Y - Ohmic conductor/metal wire
Graph Z - Lamp
You have to learn these I/V graphs. Also note that a thermistor/semi-conductor has a graph which is like the lamp but has an increasing gradient instead.
31. C
Basic formula recall needed here.
32. A
R = V²/R = 240²/100 = 576. However, this is when the filament is heated so it has increased by 16 times. The normal room temperature would therefore be 576/16 = 36.
33. C
Basic Kirchoff's first law.
34. C
Diagram 2 has the same setup as diagram 1 (2 lamps connected in each parallel setup). If you are confused about diagram 2, then just rotate it. Since they have the same setup, the brightness would obviously be the same.
35. C
The way I solved this was by trying each option until I calculated a 2V drop at R1 and 1V drop at R2. Find the total current using V = IR (where V is 5 and the total resistance is the sum of R1, R2 and R3) and then use the formula again at each resistor to find the voltage drop (5 - V).
36. A
The electron will accelerate towards the +ve plate so A. A is +ve because the field lines are directed from +ve to -ve.
37. A
E = V/d
Increasing the value of 'd' will decrease the value of 'E'. Therefore A is correct.
38. C
Fact.
39. A
Basic stuff.
40. C
Work backwards to figure this one out, and see what is happening to the nucleon number and proton number individually. Then # of neutrons is nucleon number - proton number.
November 2002 will probably come next, and then I'll do 2011 backwards.
31. Electric fields are uniform between two parallel plates.
A is wrong because the GPE does not increase.CAN U SOLVE
View attachment 27303
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