ks4 / p1a.09 producing and measuring electricity test 10_ 11 mcb answers

8/7/2019 KS4 / P1a.09 Producing and measuring electricity test 10_ 11 MCB answers

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Test B

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Surname Name

Signature

American Academy Larnaca

Year 4 Science

Test P1a.9

Foundation and Higher Tier

MULTIPLE CHOICE ANSWER SHEETTime: 20 minutes

Please check that all the details printed above are correct and sign in the box above.1. No amendments may be made to the pre-printed information on this form.

2. Shade the bubble next to the correct tier of entry: Foundation or Higher.

3. If you are doing foundation ties, please answer questions 1 24.

4. If you are doing foundation ties, please answer questions 17 40.

5. Check that you are marking the answer for the correct question number.

6. If more than one answer per question is marked, no mark will be given.

________________________________________________________________________________

Mark bubbles like thisUse an HB pencil and

rub out any errors

thoroughly.

Q. 1 24 Foundation tier

Q Answer

1 A B C D

2 A B C D

3 A B C D

4 A B C D

5 A B C D

6 A B C D

7 A B C D

8 A B C D

9 A B C D

10 A B C D

11 A B C D

12 A B C D

13 A B C D

14 A B C D

15 A B C D

16 A B C D

Q. 17 40 Higher tier

Q Answer

25 A B C D

26 A B C D

27 A B C D

28 A B C D

29 A B C D

30 A B C D

31 A B C D

32 A B C D

33 A B C D

34 A B C D

35 A B C D

36 A B C D

37 A B C D

38 A B C D

39 A B C D

40 A B C D

Q Answer

17 A B C D

18 A B C D

19 A B C D

20 A B C D

21 A B C D

22 A B C D

23 A B C D

24 A B C D


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Test B 3

Surname Initial(s)

Signature

American Academy Larnaca

Year 4 TestSingle Science

Physics

Topic P1a.9:Producing and measuring

electricity

Wednesday 23 February 2011

Time: 20 minutes

FORMULAE

You may find the following formulae useful.

ampsinusedcurrent

hour-ampinratingbatteryorcapacityhoursinTime =

t

QI

Time

ChargeCurrent ==

Q

EV

Charge

EnergyVoltage ==

I

VR

itthroughgoingCurrent

itacrossVoltageResistance ==


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Investigating thermistors

Amy and her friends investigate how the resistance of a thermistor varies with temperature.

They put the thermistor and its connecting wires inside a small oven.

17. To measure the current in the thermistor the students should connect

A an ammeter in series with the thermistor

B an ammeter in parallel with the thermistor

C a voltmeter in series with the thermistor

D a voltmeter in parallel with the thermistor

18. The students plot some of their results.


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Alans new house

Ohms law

In 1827, Georg Ohm published the results of some experiments. He had investigated the current in a

conductor and the voltage across it. His conclusion was V= I R.

19. Which of these shows his conclusion?

20. He let scientists in other parts of the world know of his discovery.

Which of these methods would he have used in 1827?

A The radio

B a telephone

C The internet

D a letter


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The table shows some of the readings on the ammeter and voltmeter in an experiment to

demonstrate Ohms law.

There is something wrong with one of the meters.

Four people suggest what is wrong.

21. Who is correct?

A Alice

B Bill

C Craig

D Dora


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Test B 7

Bens fan

Ben has a small battery operated fan. He uses the fan to keep himself cool.

22. Ben wants to make the fan spin more slowly.

He adds a resistor in series with the fan circuit which decreases the speed of the motor.

Which of these explains why the fan spins more slowly?

A Adding the resistor decreases the voltage across the battery

B Adding the resistor increases the power of the battery

C Adding the resistor increases the friction in the motor

D Adding the resistor decreases the current in the motor

23. Ben adds a circuit which will make his fan switch on when the room is warm.

Which sensor would Ben use in this circuit?

A a thermistor

B a filament lamp

C an electromagnet

D a light-dependent resistor (LDR)

Sarahs birthday presents

Sarah is given an electric car for her birthday.

24. The battery in the car has a capacity of 6 A h (amp-hours).When fully charged it can supply an average current of 3 A for

A 0.5 hour

B 2 hours

C 3 hours

D 18 hours


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Use this information to answer questions 25 to 27.

Sarah is also given a dynamo for her bicycle.

The graph shows how the output voltage of the dynamo changes with time.

25. The voltage at a time of 0.028 s is about

A 1.6 V

B 1.3 V

C 1.3 V

D 1.6 V

26. The type of voltage shown is alternating because

A The voltage decreases at first

B The greatest time shown is 0.05 s

C The voltage goes above and below 0 V

D The pattern repeats regularly with time


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27. The original graph is shown to scale for reference.

The sketch graphs are drawn to the same scale.

Which sketch graph could show the effect of the bicycle speeding up?


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Bottles and battery capacity

Annes teacher was explaining the idea of battery capacity.

Her teacher filled four bottles with water.

She poured all the water out of each bottle in turn.

She poured at different speeds and for different times.

28. Which row of the table is for the bottle with the greatest capacity?

29. In this model, the rate of flow of water from a bottle represents

A The current from a battery

B The voltage of a battery

C The power of a battery

D The energy from a battery


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30. For electricity in a wire, each millilitre (ml) of water represents a number of

A positive electrons

B positive protons

C negative electrons

D negative protons

Electric current

Students Aimee, Barbara, Carole and Denise are investigating electric currents.

31. Each student tries to describe an electric current in a copper wire.

Who is correct?

A Aimee

B Barbara

C Carole

D Denise


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32. The students investigate current in different circuits.

Which of these circuits has the largest current?

Investigating solar cells

Omar and his friends are investigating how the colour of the light shining on a solar panel affects

the output current.

They will put different coloured plastic sheets between a lamp and the solar panel.

33. The students discuss their investigation.

Who has made a prediction?

A Constance

B Jane

C Kallum

D Omar


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34. In this investigation, the independent variable is

A The height of the lamp

B The power of the lamp

C The colour of the plastic sheet used

D The output current from the solar panel

35. These are the students results for the output current for a green plastic sheet.

27 mA 24 mA 5 mA 24 mA

The value the students should use to plot on a graph is

A 5 mA

B 20 mAC 25 mA

D 27 mA


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36. These are some of the results the students obtained.

Which of these graphs is the best way of showing these results?


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Patti investigates torch cells

Patti investigates how the voltage across a cell changes with the current in the circuit.

37. At five different times, Patti measures the current for the same value of voltage.

These are her readings:

4.0A 4.1A 4.0A 4.0A 4.1A

Her teacher knows that the real value of the current should be 5.0 A for this voltage.

Which row of the table is correct for Pattis readings?

38. Patti drew this graph of her results for two different cells.

For the range of currents shown, which of these comparisons is correct?

A The range of voltages for the alkaline cell is larger

B The range of currents in the zinc chloride cell is larger

C The voltage for zero current is higher for the alkaline cell

D The voltage of the alkaline cell does not change as much


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ks4 / p1a.09 producing and measuring electricity test 10_ 11 mcb answers

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