Oxford Cambridge and RSA GCSE (9–1) Physics A (Gateway … · 2018. 3. 1. · GCSE (9–1) Physics A (Gateway Science) J249/03 Paper 3, P1 – P4 and P9 (Higher Tier) Year 11 Test

Turn over© OCR 2017 Practice paperDC (LK/CGW) 161885/3

Oxford Cambridge and RSA

GCSE (9–1) Physics A (Gateway Science)J249/03 Paper 3, P1 – P4 and P9 (Higher Tier)

Year 11 TestTime allowed: 1 hour 45 minutes

You must have:• the Data Sheet (for GCSE Physics A)• a ruler (cm/mm)

You may use:• a scientific or graphical calculator• an HB pencil

OCR is an exempt Charity

INSTRUCTIONS• Use black ink. You may use an HB pencil for graphs and diagrams. • Complete the boxes above with your name, centre number and candidate number.• Answer all the questions.• Write your answer to each question in the space provided. If additional space is

required, use the lined page(s) at the end of this booklet. The question number(s) must be clearly shown.

• Do not write in the barcodes.

INFORMATION• The total mark for this paper is 90.• The marks for each question are shown in brackets [ ].• Quality of extended responses will be assessed in the question marked with an

asterisk (*).• This document consists of 24 pages.

Last name

First name

Candidatenumber

Centrenumber

H

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J249/03© OCR 2017 Practice paper

SECTION A

Answer all the questions.

1 Which of the following is a contact force?

A Electrostatic

B Friction

C Gravity

D Magnetism

Your answer [1]

2 Which is the correct definition for density?

A Mass divided by area

B Mass divided by volume

C Weight divided by mass

D Weight divided by volume

Your answer [1]

3 Which of the following is a vector quantity?

A Displacement

B Distance

C Mass

D Speed

Your answer [1]

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J249/03 Turn over© OCR 2017 Practice paper

4 Which correctly describes an electrical current?

A Rate of flow of charge

B Rate of flow of coulombs

C Rate of flow of energy

D Rate of flow of potential difference

Your answer [1]

5 New scientific theories, such as JJ Thomson’s model of the atom, can take time to be accepted.

Which is not important for a new theory to become widely accepted?

A No outliers

B Peer review

C Publishing results

D Reproducibility

Your answer [1]

6 Which diagram shows the correct field lines for a bar magnet?

N

A

S S

B

N

N

C

S S

D

N

Your answer [1]

4


7 Which situation provides 10 W of power?

Situation Energy (J) Time (s)

P 1200 120

Q 600 60

A Neither P nor Q

B Situation P only

C Situation Q only

D Situations P and Q

Your answer [1]

8 The graph shows four journeys.

Q

A

B

C

D

Distance

Time

Which journey has the highest average speed at time Q?

Your answer [1]

5


9 A student builds a step-up transformer. The transformer has 20 turns on the primary coil and 40 turns on the secondary coil.

The input voltage is 10 V d.c.

Why does the transformer not produce the expected 20 V output voltage?

A The input voltage is d.c.

B The input voltage is too high.

C The input voltage is too low.

D The ratio of coils is incorrect.

Your answer [1]

10 Which statement describes the simple model of the Earth’s atmosphere?

A Density of the atmosphere increases with altitude.

B Temperature of the atmosphere remains constant with altitude.

C The atmosphere is a single layer of gases of uniform density.

D The atmosphere is thick compared to the size of the Earth.

Your answer [1]

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11 A student investigates the extension of pairs of identical springs.

A

5 N

B

10 N

C

5 N 10 N

D

Which pair will have the same extension as one spring pulled with a force of 5 N?

Your answer [1]

12 Two forces act on an object at right angles to each other.

This is a scale diagram of the two forces.

4 N

3 N

What is the resultant force?

A 5.0 N

B 7.0 N

C 12 N

D 25 N

Your answer [1]

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13 The graphs show the journey of four cyclists.

3

2Velocity(m / s)

Time (s)

1

2 4 6 80

A

3

2Velocity(m / s)

Time (s)

1

2 4 6 80

B

3

2Velocity(m / s)

Time (s)

1

2 4 6 80

C

3

2Velocity(m / s)

Time (s)

1

2 4 6 80

D

Which cyclist travels the furthest?

Your answer [1]

14 A boy swims in a lake at a depth of 1.0 m.

What is the change in pressure if he swims at a depth of 2.0 m?

Assume that g = 10 N / kg and density of water = 1000 kg / m3.

A 100 Pa

B 200 Pa

C 10 000 Pa

D 20 000 Pa

Your answer [1]

8


15 A loaded trolley with a mass of 10 kg travels at 10 m / s.

What happens to the kinetic energy (KE) of the trolley if the speed doubles and the mass halves?

A KE doubles

B KE halves

C KE quadruples

D KE stays the same

Your answer [1]

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SECTION B

Answer all the questions.

16 A student investigates electrostatics.

(a) (i) Describe the charges in a neutral atom.

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(ii) Use the idea of electric fields to explain why two charged objects experience an electrostatic force between them.

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(iii) Suggest one simple demonstration to show electrostatic force in action.

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(b) In a toy train, a charge of 6 C flows for sixty seconds.

Calculate the current.

Use the formula: charge flow = current × time

Answer = ...................................... A [2]

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17 (a) A student investigates the average speed of a trolley rolling down a ramp.

Look at the table of results.

Attempt Time taken (s)

1 2.9

2 3.0

3 2.7

4 2.9

5 2.1

Mean 2.72

(i) The student has made two errors when calculating the mean.

Identify the two errors and calculate the mean.

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(ii) Calculate the speed of the trolley rolling down the 2.0 m ramp.

Answer = ..................................... m / s [3]

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(b) The student now changes the angle of the ramp.

Look at the graph of the results.

100 3020 40 60Angle of ramp (°)

50 8070

Averagespeed(m / s)

2.0

1.5

1.0

0.5

0

(i) Describe the pattern shown by the results.

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...................................................................................................................................... [2]

(ii) Use the graph to estimate the speed of the trolley when the ramp is at 70°.

Answer = ..................................... m/s [1]

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18 Objects have different weights on different planets.

(a) Write down the definition of weight.

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(b) The table shows some data about five planets.

Planet Value of ‘g’ (N / kg) Diameter (km)

Mercury 3.6 4900

Earth 9.8 13 000

Neptune 12 49 000

Saturn 10 120 000

Jupiter 26 140 000

(i) Calculate the weight of a 20 kg mass on Mercury.

Answer = ..................................... N [3]

(ii) Describe the pattern between the diameter of a planet and the value of ‘g’.

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(iii) A 20 kg object is lifted upwards on Jupiter and gains 7.5 kJ of potential energy.

How high was the object lifted?

Answer = ..................................... m [4]

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19 John thinks that mass is conserved during evaporation and condensation.

He sets up some apparatus.

Liquid

Heat

Round-bottomedflask

Condenser

Cold water in

Beaker

(a)* Describe and explain how this apparatus could be used to show that mass is conserved during evaporation and condensation.

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(b) Calculate the energy needed to change 2.5 kg of water into steam.

The specific latent heat of vaporisation of water is 2.26 × 106 J / kg.

Answer = ...................................... J [2]

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20 (a) A scientist climbs Mount Everest. He carries a packet of crisps with him to the top of the mountain. At the top of the mountain the crisp packet has expanded.

Explain why.

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(b) A student uses a bicycle pump to inflate a tyre. The temperature of the gas increases as the tyre is inflated.

Explain why.

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21 A student builds a circuit to investigate the resistance of an unknown resistor.

He uses a voltmeter, ammeter, cell and a resistor.

(a) Draw a circuit diagram for this experiment.

[4]

(b) The student changes the potential difference across the resistor and records the current in the circuit.

Look at the results of the experiment.

Potential Difference (V) Current (mA)

2.0 4.0

4.0 7.0

6.0 10.0

8.0 14.0

Plot the results on the graph below and draw a line of best fit.

20 64 8 12Current (mA)

10 14

Potentialdifference

(V)

8

6

4

2

0

[3]

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(c) Use the gradient of the graph to calculate the resistance of the unknown resistor.

Answer = ..................................... Ω [3]

(d) The actual value of the resistor is 550 Ω.

Is the calculated answer within the 5% manufacturing error (tolerance)?

Explain your answer.

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22 A group of students investigated terminal velocity.

They dropped a 100 g mass from a height of 3.0 m using 3 different shapes of parachute.

The students recorded the time taken for each metre of the descent using a stop watch.

Shape of Parachute Time of fall (s)

1st metre 2nd metre 3rd metre

Round 2.75 2.05 2.04

Square 2.90 2.55 2.20

Rectangular 2.85 2.10 2.11

(a) The students are not sure that all of the parachutes reached terminal velocity.

Explain why.

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(b) Some students are concerned that their method does not give conclusive data for their experiment.

Suggest why.

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(c) How could the experiment be improved to increase the accuracy of their data?

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(d) The rectangular parachute hits the ground at 0.47 m / s.

Calculate the change in momentum when the rectangular parachute hits the ground and comes to a rest.

Use the formula: momentum = mass × velocity

Answer = ..................................... kg m / s [2]

(e) Draw a free body force diagram for the 100 g mass with the square parachute during the second metre of its fall.

[2]

20


23 Many devices use an electric motor.

A simple electric motor can be made by placing a wire loop in a magnetic field.

Wire loop Axis

Magnet

Cell

SN

(a) Explain how rotation is caused when a cell is connected to the wire loop.

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(b) What happens to the size of the force turning the motor if:

1: A second identical cell was connected in series with the first?

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2: The number of turns was doubled?

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3: The number of turns was doubled and the magnetic field strength was halved?

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(c) Coils of wire are also used in a transformer.

Look at the table.

Transformer Primary Coil Turns Secondary Coil Turns

A 600 3600

B 750 6000

C 850 6000

D 950 6000

The input voltage is 25 V.

Which transformer would produce an output voltage closest to 170 V?

Answer = ..................................... [3]

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Documents

Oxford Cambridge and RSA GCSE (9–1) Physics A (Gateway … · 2018. 3. 1. · GCSE (9–1) Physics A (Gateway Science) J249/03 Paper 3, P1 – P4 and P9 (Higher Tier) Year 11 Test