6032q2 Specimen

Extracted Content: 6032q2 Specimen

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ZIMBABWE SCHOOL EXAMINATIONS COUNCIL

General Certificate of Education Advanced Level

PHYSICS 6032/2

PAPER 2
SPECIMEN PAPER 1 hour 30 minutes
Candidates answer on the question paper.

Additional materials:
Electronic calculator and/or Mathematical tables

TIME hour 30 minutes

INSTRUCTIONS TO CANDIDATES

Write your name, Centre number and candidate number in the | ¢oR FXAMINER’S USE
spaces at the top of this page.

Answer all questions.

Write your answers in the spaces provided on the question paper!
For numerical answers, all working should be shown.

INFORMATION FOR CANDIDATES

The number of marks is given in brackets [ ] at the end of each
question or part question.

1
2
3
4
5
6
7
8

9

TOTAL
This specimen paper consists of 13 printed pages and 3 blank pages.

Copyright: Zimbabwe School Examinations Council, Specimen Paper.
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speed of light in free space

c =3.00 x 108ms“!

permeability of free space

Uo =4nx 107-7 Hm?

permittivity of free space

& =8.85x 1072 Fm? (1/47, =8.99 x
10° mF~*)

elementary charge

e=1.60x10°%C

the Planck constant

h =6.63 x 107-74 Js

unified atomic mass unit

Tu=1.66x 10-” kg

rest mass of electron

m, =9.11 x 1073! kg

rest mass of proton

Mp = 1.67 x 10-27 kg

molar gas constant

R =8.31 JK~tmol™+

the Avogadro constant

N, = 6.02 x 1023mol™?

the Boltzmann constant

k=1.38 x 10-23 JK—

gravitational constant

G =6.67 x 10-11Nm2kg~?

acceleration of free fall

g =9.81 ms“?

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uniformly accelerated motion

work done on/by a gas
gravitational potential
hydrostatic pressure
pressure of an ideal gas
simple harmonic motion

velocity of particle in s.h.m.

Doppler effect

Attenuation of x-rays
electric potential

capacitors in series
capacitors in parallel
energy of charged capacitor

electric current
resistors in series

resistors in parallel

Hall voltage

alternating current/voltage

radioactive decay

decay constant

s=ut + Yat?

v? =u? +2as

W =p AV
@ =-Gm/r
p =pgh

=i ec (2s
p 3 OV

2

a=-Wwrx

Vv =V, COS wt

v = wl GF ==)

f = fsv
0 vt,
I=I,e4%%
- 2
Amer

WC =1/C, +1/C, +...

C=C, +C, +...
1

W=5QV

I= Anvg

R=R, +R, +...

1R=1/R, +1/R2 +...

BI
—

ntq
x =X, sinwt
xX =X, exp(-At)

_ 0.693
t1

A

2
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(b)

Define angular velocity.

A body is moving in a circular path of radius, r, at constant linear velocity, v,
angular velocity,w, and period T.

Deduce an expression connecting v, r and T.

Fig. 1.1 shows a 0.6 kg stone tied to one end of a string whirled in a vertical
of circle of radius 0.4 m at a constant rate of 12.0 turns per minute.

Stone
Fig. 1.1

(1) Show on Fig. 1.1, the direction of linear velocity v and centripetal
acceleration, a.

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centripetal acceleration =

(iii) Label a point Q where the stone would be when the string is most
likely to break.

(iv) Determine the tension in the string at Q.

Tension = [6]

(d) Explain why passengers experience a normal reaction less than their weight
when the vehicle goes over the top of a curved bridge.

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(b)

©

Define gravitational potential.

A stone of mass, m, has gravitational potential energy, Ep, at a point, X, ina
gravitational field of potential ¢.

Write an expression for gravitational potential ¢ in terms of m and Ep.

For an isolated spherical planet of radius R, the value of ¢ at its surface
is—6.3x 10’ Jkgt.

Calculate the change in gravitational potential energy fora 1.4 kg stone
moving towards the planet from a distance of 6R to 3R.

Change in gravitational p.e = [3]

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(a) (1) Complete the path of the ray as it passes through the air into glass.

(ii) Determine the angle to the horizontal at which the ray emerges
from air entering glass if the angle of incidence in glass is 40°.

[5]

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+ . 1
(b) Derive the equation n =——.
sinc Examiner's
Use

Fig. 4.1(a) and Fig 4.1(b) shows an X-ray beam from an anode target.

electron electron
eam beam 1
1 i/o]
/ ! A ;
1 ! ' f
1 ! 1 1
| «;— Xray beam ; <1 Xray beam
F 1 ' 1
Fig.4.1(a) Fig 4.1(b)
(a) @ State the figure which shows the X-ray beam preferred in X -ray
imaging.

di Explain your choice in part (a)(i).

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©

(d)

Explain why a patient is given a barium meal before an X -ray image of the
stomach is taken.

The number 7 is written in a voxel as shown.

State what the number 7 represents.

State the advantage of the image obtained using CT scanning over the image
obtained using X-rays.

When a slide wire potentiometer is used to measure the emf of a cell, a balance point
cannot be found along the resistance wire.

Explain how a voltmeter may be used to discover the cause of the problem.

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(a) State Faraday’s law of electromagnetic induction. For
Examiner's

(b) Fig. 6.1 shows a lump of soft solders at the centre of a coil. The coil is
connected to a signal generator.

Solders

SIGNAL
GENERATOR

Fig. 6.1

Describe and explain what happens to the solder when the a.c. frequency
is increased to a high value.

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(a)

11

State two devices of modern electronic technology which have improved
speed of communication.

Suggest, with an explanation, an electronic input transducer which can be used
ina car to detect that

@ the seat belt is not fastened,

di headlamps are not switched on,
(iii) the engine requires cooling.

Define

@ Density

di Pressure

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(a)

(b)

12

Use the definitions you have given in (a) to derive the equation P=egh for the
pressure, P, at a depth, h, in a fluid of density @.

Explain why it is much more difficult to reduce the effects of noise when
transmitting an analogue signal than when transmitting in digital form.

di Explain the term attenuation.
(iii) State one cause of attenuation in optical fibres.

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() @ Distinguish between a geostationary satellite and a polar satellite.
For

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di Give three reasons why microwaves are used for satellite
communication.

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