2011_Physics_Alevel_mj_paper2

Extracted Content: 2011_Physics_Alevel_mj_paper2

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| PHYSICS 9188/2

| PAPER 2

| JUNE 2011 SESSION { hour 15 minutes

i .

i candidates answer on the question paper.

1 Additional! materials:

| Electronic calculator and/or Mathematical tables

NL

TIME 1 hour 15 misutes

INSTRUCTIONS TO CANDIDATES FOR EXAMINER’S USE

Write your name, Centre number and candidate number in the
spaces at the top of this page.

| -\nswer all questions.

Write your answers in the spaces provided on the question paper. {|

For numerical answers, all working should be shown. 3

INFORMATION FOR CANDIDATES 4
The number of marks is given in brackets | ] at the end of each 5
question or part question. a
6 |
|
4
fo
8
—+
5
mn |
TOTAL
Ls ne!

ZIMBABWE SCHOOL EXAMINATIONS COUNCIL

Centre Number Candidate Number

ae
@®
\
WS J

ar Performance Measurement

General Certificate of Education Advanced Level

rr
|}
2

This question paper consists of 11 printed pages and 1 blank page.

®ZIMSEC /2011

Copyright: Zimbabwe Schoo! Examinations Council, 12011. |
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speed of jight in free space, ¢=3.00x 108ms

permeability of free space, Mg = 40 x 1077 Hor!

permittivity of free space, € = 8.85 x 10712 Fm!

elementary charge, e=1.60x10-19C

the Planck constant, h= 6.63 x 1074 Us

unified atomic mass constant, u= 1.66 x 10-87 kg

rest mass of electron, mM, = 9.11 x 1073! kg

rest mass of proton, My = 1.67 x 10°27 kg

molar gas constant, R=8,31 JK? mot

the Avogadro constant, Ng = 6.02 x 1073 mol!

the Boltzmann constant, k = 1.38 x 10723 JK71

gravitational constant, G = 6.67 x 1071! Nm? kg-?

acceleration of free fall, g=9.81ms2

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uniformly accelerated mation, s- ute gat?

v? = u2+2as
work done on/by a gas, W= pAVv
gravitational potential, g=- Gn

r
refractive index, n= r.
sinc
resistors in series, R=F,+Ayt...
resistors in parallel, 1/R=1/R, + 1/Ry +...
electric potential oe!
, 4teor
’ capacitors inseries, - WC = A/G, + U/C, tn
capacitors in parallel, C= C, + Cy tee
energy of charged capacitor, W= 3QV
alternating curreni/voltage, X= X)sin ot
hydrostatic pressure, p=pgh
. ; iNm
pressure of an ideai gas, p= 377 <ce>
radioactive decay, X = X, exp(~ At)
decay constant, A= 0.693
4
SE pil hem cant Santali Tide 3H?
critical density of matter in the Universe, Po= BG
equation of continuity, Av = constant
Bernoulli equation (simplified), Dp, + Epve= pp + seve
Stokes’ law, P= Ary
Reynolds’ number, A, = en
drag force in turbulent flow, F = Br?pv?
9188/2 J2011

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4

Answer all questions.

ish between a random error and a systematic error.

to
&
1o)
os
127
faa
33
ga
4
fen

(b) A student wishes to use a micrometer screw gauge to measure the
diameter of a wire.

(i) Suggest how the student can

le reduce the systematic error in a reading,
2. allow for a non-circular cross section of the wire,
3% allow for a wire of varying diameters.

(i) The volume, Y, of a cylinder of length, Z, and radius, 2, is given

by ©
V=nRL.

Calculate the radius of the cylinder and its uncertainty, given

that

ws)
Qh
Oo
tt
oo
m Lo
ws Ne
& &
gF

hy OX
{t
an

tt

radius =

9188/2 J2011

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(a)

(b)

(3)

fs
»

State the universal law of gravitation.

[2]
A satellite of mass, m, is in a geostationary orbit.
e)) Define a geostationary orbit.
(ii) | Show that the radius, r, of the orbit is given by
2
r=3 ge
Ww"
where symbols have their usual meanings.
3
(i) State the Bernoulli’s principle.
(ii) Give two conditions necessary for Bernoulli’s equation to be
valid.
[3]

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(b)

6

Oil of density 800 kgm ~ flows along a horizontal pipe of cross-sectional
area 60 cm? with a velocity 2.3 ms~'. It entérs a constriction of
cross-sectional area 5.5 cm’.

Calculate

G) the velocity of oil at the constriction,

velocity =

(ii) the drop in pressure, Ap, which occurs when the oil enters the
constriction.

Ap=__ (#]

State four assumptions of an ideal gas.

7
dee

(0) Explain the potential energy and kinetic energy that make up the
internal energy of a gas.

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For

(id Explain why the energy of an ideal gas is wholly kinetic. Examiner's

. [3]
(a) In an a-scattering experiment an c-particle was directed towards the
centre of a gold, (53 Au), nucleus as shown in Fig. 5.1. The a-particle
moves with a kinetic energy of 4.8 MeV towards the nucleus.
a. - particle ; gold
aan Sie cal = nucleus
Fig. 5.1
@ Sketch on Fig. 5.1 the path of the a-particle.
Gi) Determine the distance of closest approach of the a-particle
to the gold nucleus.
distance of closest approach = [4]
(b) State three uses of radioisotopes.
1,
2
|
3. |
[3]

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State Kirchoff’s two laws.

State the respective quantity conserved in each law.

1.

2

iD

(i)

Define the term,

1.

2.

State two conditions necessary for interference.

1.

Nw

interference,

diffraction.

(4]

[4]

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{b)

Light of wavelength 630 nm is incident normally on a diffraction
grating with 900 lines per millimetre.

Determine

(i)

(ii)

the angle for the first order diffraction pattern,

angle =

the maximum number, N, of bright fringes which can be
observed.

Give one example of

(i)

(ii)

(ii)

an input transducer,

[5]

an output transducer.

Define negative feedback.

[2]

Give two advantages of negative teedback.

(3]

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(a) State one example of

(0) a crystalline solid,

(ii) an armophous solid,

(iii) a polymer.

(b) Distinguish between plastic and elastic deformation.

(c) Fig. 9.1 shows the variation of length, /, with force, F, of a particular
material.
A
lima
0,4 f------------<5
1
1
1
0,2 1
1
!
1
t
i
1
Le FN
e 0 25
q) State with a reason if this material obeys Hooke’s law.

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il

Determine the maximum strain energy, E, stored in the stretched
material.

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