Paper 1 Nov 1999 Physics

UNIVERSITY OF CAMBRIDGE LOCAL EXAMINATIONS SYNDICATE Joint Examination for the School Certificate and General Certificate of Education Ordinary Level

5054/1

PHYSICS PAPER 1 Multiple Choice Thursday

11 NOVEMBER 1999

1 hour

Additional materials: Multiple Choice answer sheet Soft clean eraser Soft pencil (type B or HB is recommended)

TIME

1 hour

INSTRUCTIONS TO CANDIDATES Do not open this booklet until you are told to do so. Write your name, Centre number and candidate number on the answer sheet in the spaces provided unless this has already been done for you. There are forty questions in this paper. Answer all questions. For each question, there are four possible answers, A, B, C and D. Choose the one you consider correct and record your choice in soft pencil on the separate answer sheet. Read very carefully the instructions on the answer sheet. INFORMATION FOR CANDIDATES Each correct answer will score one mark. A mark will not be deducted for a wrong answer. Any rough working should be done in this booklet.

This question paper consists of 12 printed pages. SB (SLC / JB) QK94120/3 © UCLES 1999

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2 1

The diagram shows part of the vernier scale on a pair of calipers.

0

10 3 cm

4 cm

Which reading is correct? A

2

3

2.74 cm

B

3.10 cm

C

3.26 cm

D

3.64 cm

Why does an object falling in the Earth’s gravitational field reach a steady velocity? A

Air resistance increases with increase of velocity.

B

The Earth’s gravitational field decreases as the object falls.

C

The mass of the object remains constant.

D

The weight of the object increases as it falls.

A car starts from rest and is uniformly accelerated to a speed of 30 m/s in 6 s. 30 speed m/s 20 10 0 0

1

2

3

4

time s

5

What is the distance travelled by the car? A

4

5m

B

30 m

C

90 m

D

180 m

What causes a moving body to resist a change in its state of motion? A

its acceleration

B

its inertia

C

its speed

D

its weight 5054/1 W99

6

3 5

The gravitational field strength on the surface of the Moon is 1.6 N/kg. Which values of mass and weight are correct for an object placed on the Moon’s surface?

6

7

mass / kg

weight / N

A

10

1.6

B

10

16

C

16

10

D

16

160

Which set of equipment could be used in an experiment to determine the density of an irregularly shaped pebble? A

mass balance and measuring cylinder

B

mass balance and micrometer

C

measuring cylinder and vernier calipers

D

newton-meter and vernier calipers

The diagram shows a metre rule pivoted off-centre but kept in equilibrium by a suspended mass of 240 g.

; 0

5

20

50

100 cm

pivot

240 g

The centre of mass of the rule is at the 50 cm mark. What is the mass of the rule? A

8

12 g

B

24 g

C

45 g

D

120 g

Which row correctly describes force, mass and acceleration as vector or scalar quantities? force

mass

acceleration

A

scalar

scalar

scalar

B

scalar

vector

scalar

C

vector

scalar

vector

D

vector

vector

vector

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4 9

A tennis ball is dropped on to a horizontal surface. As the ball bounces up and down, the height of each bounce gradually decreases. During the motion of the ball, A

the kinetic energy of the ball is constant.

B

the potential energy of the ball is constant.

C

the sum of the kinetic and potential energies of the ball is constant.

D

the total energy of the ball, ground and air is constant.

;;; ;;; ;;;

10 The height of a mercury barometer is h when the atmospheric pressure is 100 000 Pa.

h

X

h 5

What is the pressure at X? A

20 000 Pa

B

80 000 Pa

C

120 000 Pa

D

180 000 Pa

11 When the Brownian motion of smoke particles in air is observed with a microscope, moving points of light are seen. These points of light are reflections from A

air particles only, moving randomly.

B

smoke particles only, moving randomly.

C

smoke particles only, vibrating.

D

both smoke and air particles, moving randomly.

12 Why do people feel cool if they do not dry themselves after swimming in the sea? A

Water evaporates and causes cooling.

B

Water insulates them from the warm air.

C

Water is a good conductor of heat.

D

Water is colder than the air.

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5 13 Which of the following expands most when its temperature is raised by 10 K (°C)? A

10 cm3 of air

B

10 cm3 of copper

C

10 cm3 of ice

D

10 cm3 of water

14 A thermometer reads 1°C in pure melting ice and 101°C in steam above boiling water. It is used to measure the temperature of water before and after it is heated. What is the error when the temperature rise is calculated? A

2°C too low

B

1°C too low

C

zero

D

1°C too high

15 Which material is the best absorber of infra-red radiation? A

dark animal fur

B

shiny metal

C

window glass

D

white paper

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16 The diagram shows a metal saucepan containing water and placed on a hot plate. After some time, the air at point X also becomes hot. X

metal saucepan

water

hot plate

What are the main ways by which heat travels from the hot plate through the base of the metal saucepan, through the water and through the air to point X? through the base of the saucepan

through the water

through the air

A

conduction

convection

convection

B

conduction

radiation

convection

C

convection

convection

conduction

D

radiation

convection

conduction 5054/1 W99

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6 17 Which of the following is a correct example of a transverse wave and of a longitudinal wave? transverse wave

longitudinal wave

A

ripples on water

light

B

ripples on water

sound

C

sound

light

D

sound

ripples on water

18 The diagram shows the waves in a ripple tank in which the water in parts P and Q is of different depths. V1

V2

P

Q

How do the wavelengths and the speeds V1 and V2 of the waves compare in P and in Q? wavelength

speed

A

greater in P

V1 is greater

B

greater in P

V2 is greater

C

greater in Q

V1 is greater

D

greater in Q

V2 is greater

19 When a narrow beam of white light passes through a prism, it produces a spectrum. Which diagram correctly shows the refraction and dispersion produced by the prism? A

B V R

key V = violet R = red

R V

C

D

V

R V

R 5054/1 W99

7 20 The focal length of a thin converging lens is 10 cm. What is the maximum distance from the lens that the object can be placed so that the lens acts as a magnifying glass? A

5 cm

B

10 cm

C

15 cm

D

20 cm

21 A microphone is connected to an oscilloscope. The diagram shows the trace on the screen when the microphone receives a pure note.

Which trace can be obtained when a musical instrument produces a note of the same pitch but of a different quality?

A

B

C

;

D

22 A piece of thin card is held against the teeth of a cog wheel. thin card in clamp

cog wheel

When the wheel is turned at high speed, a note is heard. How can the pitch of the note be raised? A

by pressing the card against the teeth with a greater force

B

by turning the wheel more quickly

C

by using a thicker card

D

by using a wheel with fewer teeth 5054/1 W99

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8 23 Which of the following is the most effective way to demagnetise a magnetised steel needle? A

Drop it on the floor.

B

Leave it inside a solenoid carrying direct current.

C

Leave it next to another strong magnet.

D

Slowly pull it out of a solenoid carrying alternating current.

24 A length of copper wire, coiled around a core, is used as an electromagnet. Which combination produces the strongest electromagnet? number of turns

core

A

few

soft-iron

B

few

steel

C

many

copper

D

many

soft-iron

25 Which diagram correctly shows the forces F that act on two charged spheres suspended close to each other?

A

F

B

F

C

F

D

F

F

F

F

F

26 What is the current in a 5.0 Ω resistor when the potential difference between the ends of the resistor is 2.5 V? A

0.50 A

B

2.0 A

C

2.5 A

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D

12.5 A

9 27 The diagram shows an electrical circuit. ammeter reading 2 A A

3X

X

3X

What is the current at point X? A

1A

B

2A

C

3A

D

4A

28 A circuit contains a low voltage supply in series with 2 bulbs. An ammeter in the circuit measures the current in the bulbs and a voltmeter measures the voltage of the supply. Which diagram shows the correct circuit? A

B

C

D

A V low voltage supply

V

V

low voltage supply

low voltage supply

A

A

low voltage supply

V

A

29 What happens when a 250 V, 2500 W water heater is connected to a mains supply using a plug fitted with a 5 A fuse? A

The fuse in the plug melts.

B

The heater burns out.

C

The heater runs at half power.

D

The heater works normally.

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10 30 The diagram shows a resistor connected to a cell of e.m.f. 2 V.

5X

2V

How much heat energy is produced in the resistor in six seconds? A

2.5 J

B

4.8 J

C

10 J

D

60 J

31 Why is the core of a transformer made of iron? A

Iron is a good electrical conductor.

B

Iron is cheaper than copper.

C

Iron is easily magnetised and demagnetised.

D

Iron makes a good permanent magnet.

32 A small coil is connected to a meter as shown. S

N

0

When a magnet is pushed into the coil, the pointer of the meter kicks to the right of zero. What happens to the pointer of the meter when the magnet is pulled back from the coil? A

The pointer gives a continuous reading to the left.

B

The pointer gives a continuous reading to the right.

C

The pointer kicks to the left.

D

The pointer kicks to the right.

33 What is emitted by the hot metal filament in a cathode-ray tube? A

α-particles

B

electrons

C

protons

D

X-rays

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11 34 The diagram shows how the e.m.f. of a simple generator varies with time. +2 e.m.f. / V 0 0

5

time / ms

–2 What is the frequency and the maximum value of the e.m.f.? frequency / Hz

maximum e.m.f. / V

A

200

2.0

B

200

4.0

C

400

2.0

D

400

4.0

35 An α-particle is the same as A

a helium nucleus.

B

a high speed electron.

C

a hydrogen nucleus.

D

electromagnetic radiation of short wavelength.

36 The half-life of a given radioactive isotope is 10 years. The original mass of the isotope is 12 g. What mass of this isotope remains undecayed after 20 years? A

0.6 g

B

1.2 g

C

3.0 g

D

6.0 g

37 Geiger and Marsden performed an experiment in which they fired α-particles at a thin sheet of gold foil. What did the results of this experiment show about gold atoms? A

They are mostly empty space but with a negative nucleus.

B

They are mostly empty space but with a positive nucleus.

C

They are spaced far apart.

D

They are smaller than α-particles.

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12 38 The table shows the composition of the nuclei of three nuclides, X, Y and Z. nuclide

number of protons

number of neutrons

X

12

12

Y

13

12

Z

13

13

;; ;;

Which nuclides are isotopes of the same element? A

X and Y only

B

X and Z only

C

Y and Z only

D

X, Y and Z

39 The path of a beam of electrons becomes circular as it enters the shaded region on the diagram.

beam of electrons What does the shaded region contain? A

a magnetic field at right-angles to the beam

B

an electric field in the plane of the beam

C

light waves in the plane of the beam

D

γ-rays at right-angles to the beam

40 A quantity of gas in a sealed balloon is cooled down. No gas is allowed to enter or leave the balloon. How do the listed properties of the gas change? mass

volume

density

A

decreases

stays the same

increases

B

increases

stays the same

decreases

C

stays the same

decreases

increases

D

stays the same

increases

decreases

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