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1 Diagram shows a simple transformer. The bulb does not light up.

Which step will cause the bulb to light up?

A Increase the number of turns of the secondary coilB Decrease the number of turns of the primary coil

C Replace the ! battery with a " ! battery

D Replace the ! battery with a ! alternating current supply

2  Diagram shows part of the #ational $rid #etwor%.

What is the magnitude of the &oltage and the type of current in the transmission cables?

3 A radioacti&e sample has an initial acti&ity of '()) counts per minute. After *( days+the acti&ity is ',* counts per minute.

What is the half life of the radioacti&e sample?

A " days

B '- daysC , days

D / days

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4  Diagram shows three possible radioacti&e decays+ 0+ 1+ and R on a graph of nucleon

number+ A+ against proton number+ 2.

Which decay emits a beta particle?

A 0B 1

C R 

D 0 3 1

5 The following e4uation is for a nuclear fusion.

What is 5?

A 0rotonB #eutron

C Beta particle

D Alpha particle

6  In a nuclear reactor+ moderator is used to

A absorb slow neutrons

B slow down the fast neutronsC dri&e the steam turbine to generate electricity

D absorb radioacti&e emissions from the core of the reactor

7 Diagram shows an arrangement to determine the types of radioacti&e rays emitted byradioacti&e source.

The result obtained as below6

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As the conclusion+ this radioacti&e source emitsA 7 particles only

B 8 particles only

C 7 particles and 9 raysD 7 particles+ 8 particles and 9 rays

8 Diagram shows the decay cur&e of a radioacti&e sample.

What is the acti&ity of the radioacti&e sample after ') days?

A -)) counts per minuteB ()) counts per minute

C *) counts per minute

D '* counts per minute

9 Which of the following is #:T the direction of 7;particles approach &ery close to

the nucleus of an atom?

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10 Three nuclei 5+ < and 2 ha&e proton numbers and nucleon numbers as shown in the

table below.

Which nuclei are isotopes of the same element?

A 5 and < onlyB 5 and 2 only

C < and 2 only

D 5+ < and 2

11 A nuclide/"! decays to nuclide)

")W and emits alpha;particles and beta;particles. =ow many alpha and

 beta particles are produced?

A ( 7 and / 8

B / 7 and ( 8

C ( 7 and ( 8

D / 7 and / 8

12  Diagram shows a transformer.

What will happen to > if the switch is : and :# for e&ery seconds ?

A > will light up only if switch @ is :

B > will light up if switch @ is :#C > will light up for a while when switch @ is :# and :D > will light up all the times when switch @ is :#

13 Diagram shows a simple electrical transmission.

Which of the statement is true ?

A Transformers 5 and < are the same type.

B Alternating current is used in cables A and B

C Input and output &oltages for transformer < are the sameD Current flows in cable A are e4ual to the current flows in cable B

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14  Diagram shows the emission of alpha+ beta and gamma ray in a strong magnetic field.

What are the radiations of 5+ < and 2?

15  A radioacti&e isotope has a half;life of minutes. What can be deduced fromthe statement?

A After minutes+ of the isotope remains.

B After minutes+ of the isotope remains.C After ( minutes+ of the isotope remains.

D After ( minutes+ of the isotope remains.

16  Which of the following is a fussion reaction?

17 Which of the following is correct about the penetrating power of 7 +8 and 9 .

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18 The number of turns between each pair of output terminals of a transformer is shown in

the diagram . Which of the following terminals produced the output &oltage '!.

A 0 and 1

B 1 and R 

C R and @

D 0 and R 

19 A transformer is -) efficient with the primary &oltage of () ! and the secondary

&oltage of ' !. If the current in the secondary circuit is ( A+ calculate the current in the

 primary circuit.

A .*) A

B *.*) A

C '.)) A

D ).* A

20 A radioacti&e source emits radiation that can pass through a sheet of paper but notthrough thic% aluminium.

What type of radiation is emitted?

A 7 - particles

B 8 - particles

C 9 - particles

D 5;rays

21 Which of the following statements is a characteristic of gamma radiation?

A It has a positi&e charge

BIt is an electromagnetism wa&eC It has a higher ioniing power than alpha

D It has a lower penetrating power than beta

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22 A pupil in&estigates the penetrating power of radiation from a radioacti&e source.

The table shows her results.

The source emits

A alpha and beta;particles.

B beta;particles and gamma;rays.

C beta;particles only.

D gamma;rays only.

23 The e4uation shows the decay of the nuclide 5.

What are the &alues of 0 and 1?

24 A company built fi&e identical houses in different parts of the same country. When a radioacti&itycount was carried out in each house+ one of them had a much higher reading than the others.

What is most li%ely to cause this higher reading?A the @unEs radioacti&ity

B the time of year when the reading was ta%en

C a nuclear power station ten miles away from the house

D  bac%ground radiation from roc%s under the house

25 When dealing with radioacti&e substances there are possible dangers.

Which statement is correct?

A Beta;particles can pass through s%in and damage body cells.

B $amma;radiation is more dangerous than alpha or beta because it has a longer half;life.

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C Faterials that emit only alpha;particles must be %ept in thic% lead containers.

D Radioacti&e materials are safe to handle after two half;li&es.

26 The diagram shows part of an a.c. generator when its coil is in a horiontal position.

The graph shows the &oltage output plotted against time.

Which point on the graph shows when the coil is in a &ertical position?

27  A long fleGible wire is wrapped round two wooden pegs. A large current is passed in the direction shown.

Which two pairs of lengths of wire attract each other?

28 Which action will most increase a personEs eGposure to radioacti&ity?

A eating food that has been sterilised by eGposure to gamma rays

B going for a flight in a high;flying aircraft

C opening the windows of a house

D using a $eiger;FHller tube and counter 

29  A radioacti&e source is placed / cm from a $eiger;FHller tube in air. The a&erage count rate is

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,( counts minute.

Then+ in three eGperiments+ measurements are ta%en with sheets of different materials placed between the source and the tube. The results are recorded in the table.

Which types of radiation does the source emit?

A  alpha and beta only

B  alpha and gamma only

C  beta and gamma only

D  alpha+ beta and gamma

30  A student in&estigates the emission from an un%nown radioacti&e source. The source is ') cm in

front of a detector. A strong magnetic field between the source and the detector is then switched

on.

The results are shown.

Which radioacti&e source produced these results?

31 The diagram shows one type of radiation passing between the poles of a strong magnet and

 being detected.

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Which type of radiation is being detected?

A  alpha;particles only

B  beta;particles only

C  gamma;rays only

D  alpha;particles and beta;particles32  An eGperimenter sets up the following apparatus+ in air+ to disco&er whether a radioacti&e source

is emitting alpha;particles.

The eGperimenter mo&es the paper between the source and the detector. There is no differencein the count;rate. Why is this?

A  0aper does not absorb alpha;particles.

B  The count;rate due to the bac%ground radiation is too high.

C  The radioacti&e source is too far from the detector.

D  The source emits beta;particles and alpha;particles.

33 What is the purpose of carbon brushes in the d.c. motor?

A To ensure good contacts between the stationary components and the mo&ing components.

B To allow the coil to rotate continuously

C To ensure the current flowing through the coil is direct current.

D To pre&ent the wires from entangling.

34 In the diagram below. what are the directions of the electromagnetic forces acting on wire 5 and wire

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35 The figure below shows an upwards force acting on a current;carrying wire. What is the direction of the

magnetic field?

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36 The diagram below shows a simple d.c. motor.

Which combination will achie&e the direction of rotation shown in the diagram?

37 A conducting rod mo&es perpendicularly across the gap between two magnets as shown below.

What is the direction of the induce current in the rod?

38 A conducting rod and an insulating rod Jboth aGes go into the paperK are being dropped between two

magnets as shown below. Which of the following are true?

' The induced current in the conducting rod flows out of the paper.

The conducting rod ta%es a longer time to pass through the magnetic field than the

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  insulating rod.

/ The conducting rod will be attracted to the magnets.

 A 'and only B l and /onlyC and /only D '+ and /

39What is the power loss when ')%W at ))! is supplied through a cable of total resistance

Ω

?

A '))W B )))W C *)))W D ))))W

40 The diagram below shows a simple d.c. motor  

=ow can the direction of rotation be re&ersed?