edecel gcse physics p2 topic 1 and topic 2 ts test 13_14

8/14/2019 Edecel GCSE Physics P2 Topic 1 and Topic 2 TS test 13_14

1/17

TEST 1PART A

Surname Name

American Academy Larnaca

Year 5 Physics

Semester 1 Test 1

Unit P2 Physics for your future

Topic 1 Static and current electricity

Topic 2 Controlling and using electric currents

Friday 1 November 2013

Part A Time: 20 minutes

The total marks for this part is 20.

The total marks for the paper is 40.

The marks for each question are shown in square brackets.

Use this as a guide as to how much time to spend on each question.

Questions labelled with an asterisk (*) are ones where the quality of your written communication

will be assessed.

You should take particular care with your spelling and grammar, as well as the clarity of expression,

on these questions.

Answer the questions in the spaces provided.

There may be more space than you need.


2/17

TEST 1PART A

FORMULAE

You may find theses formulae useful

charge = current time Q= I t

potential difference = current resistance V= I R

electrical power = current potential difference P= I V

energy transferred = current potential difference time E= I V t

force = mass acceleration F= m a

weight = mass gravitational field strength W= m g

momentum = mass velocity p= m v

work done = force distance moved in the direction of the force E= F d

GPE = m g h

Do not forget to include units in all your answers.


3/17

TEST 1PART A

_______________________________________________________________________________________

1. (a) A student investigates how the resistance of a wire depends on its length.

The photograph shows the circuit that the student uses.

Draw a circuit diagram to show how the components in the photograph are connected.

(2)

(b) Complete the table by naming the key variables in this investigation.

(1)

Independent

variable

Dependent

variable

[Total for Question 1 = 3 marks]

_______________________________________________________________________________________

(Turn over)


4/17

TEST 1PART A

2. Alan rubs a ballon on his hair and the ballon becomes positively charged.

He holds the ballon close to, but not touching, an empty aluminium can.

The charges on the can separate so that it looks like this.

N :..

(1)

(b) Explain why the can moves.

(3)


_______________________________________________________________________________________

(Turn over)


5/17

TEST 1PART A

3. The circuit diagram shows how a student connects several components.

These include four identical 1.5 volt cells.

(a) Identify component X

(1)

(b) Draw a graph of Current vs Voltage for component X

(2)

(c) State a difference between a fixed resistor and a variable resistor.

(1)


6/17

TEST 1PART A

(d) Calculate the voltage, in volts, across the four cells.

(1)

V . V

(e) The voltage across the fixed resistor is 3.8 V.Calculate the voltage, in volts, across the rest of the circuit.

(1)

Voltage . V

(f) The reading on ammeter R is 40 mA.

State the readings in milliamps on each of the other two ammeters.

(1)

ammeter P . A Q A


_______________________________________________________________________________________


7/17

TEST 1PART A

4. A student investicates how the resistance of a thermistor varies with temperature.

The student uses a voltmeter and ammeter readings to find the resistance at each temperature.

One set of readings is shown below.

temperature inoC voltmeter reading in V ammemeter reading in mA

80 13.2 2.60

(a) Show that the resistance of the thermistor at 80oC is about 5000 .

(2)

(b) Another student takes measurements for two more components, A and B.

The graphs show the results.


8/17

TEST 1PART A

Compare the results for component A and component B.

(4)


_______________________________________________________________________________________

TOTAL FOR PART A = 20 MARKS

_______________________________________________________________________________________

END


9/17

TEST 1PART B

Surname Name

American Academy Larnaca

Year 5 Physics

Semester 1 Test 1

Unit P2 Physics for your future

Topic 1 Static and current electricity

Topic 2 Controlling and using electric currents

Friday 1 November 2013

Part B Time: 20 minutes

The total marks for this part is 20.

The total marks for the paper is 40.

The marks for each question are shown in square brackets.

Use this as a guide as to how much time to spend on each question.

Questions labelled with an asterisk (*) are ones where the quality of your written communication

will be assessed.

You should take particular care with your spelling and grammar, as well as the clarity of expression,

on these questions.

Answer the questions in the spaces provided.

There may be more space than you need.


10/17

TEST 1PART B

FORMULAE

You may find theses formulae useful

charge = current time Q= I t

potential difference = current resistance V= I R

electrical power = current potential difference P= I V

energy transferred = current potential difference time E= I V t

force = mass acceleration F= m a

weight = mass gravitational field strength W= m g

momentum = mass velocity p= m v

work done = force distance moved in the direction of the force E= F d

GPE = m g h

Do not forget to include units in all your answers.


11/17

TEST 1PART B

1. Describe onesituation where separation of electric charge can create a spark.

(2)


_______________________________________________________________________________________

2. The diagram shows how two diodes are connected in a circuit.

The graph shows the current leaving the supply.

a. Explain if the current shown is AC or DC.

(2)

b. State a source that produces DC current.

(1)


12/17

TEST 1PART B

c. Which row of the table is correct for the currents in the three ammeters?


3. During a lightning flash a total charge of 92 C flows.

The average current is 1948 A.

Calculate the duration of the flash in seconds.



13/17

TEST 1PART B

4. Mobile phones have a rechargeable battery which is recharged by means of a mains adaptor.

One such adaptor has an input of 4.8W at a voltage of 230 V.

(a) Calculate the input current to the adaptor when it is in use.

(2)

(b) The electrical energy that is required to charge a mobile phone is 52000 J.

Calculate the time that is needed to charge the mobile phone.

(2)


5.

When paint is sprayed from a paint gun, the painter normally needs to use a fair amount of skill to ensure

the paint goes on evenly. By connecting the spray nozzle to a negative electrode, it is possible to charge

each droplet of paint(from Wikibooks.org).

Why do the drops of paint spread out when they leave the nozzle?

(2)


(Turn over)


14/17

TEST 1PART B

6. Mike works as a forensic scientist.

He uses an electrostatic lifter (EDPL) to detect faint footprints on surfaces.

The diagram shows a simplified EDPL and the box describes how it works.

This is how it works

A lifting sheet, A, is placed over the faint footprint.

A metal plate, B is placed near it.

A control unit applies a voltage of 10 kV between the lifting sheet and the metal plate.

The lifting sheet becomes negatively charged and the metal plate becomes positively charged.

A dust print forms on the lower surface of the lifting sheet.

(a) Use the idea of charge movement to explain how the lifting sheet, A, becomes negatively

charged and the metal plate, B, becomes positively charged.

(2)

(Turn over)


15/17

TEST 1PART B

*(b) The photograph shows a typical dust print on a black lifting sheet.

Suggest why the dust particles are lifted off the floor onto the lifting sheet.

(4)


_______________________________________________________________________________________

TOTAL FOR PART B = 20 MARKS

_______________________________________________________________________________________

END

TOTAL FOR PAPER = 40 MARKS


16/17

Mark scheme

Part A

1. (a) correct symbols for ammeter, voltmeter and battery;

ammeter in series with cells and voltmeter in parallel with wire;

(b) independent : length;

dependent : resistance;

2. (a) electron;

(b) movement together / towards balloon;

due to attraction;

between the positive charges on the balloon and the negative charges on the can (or between oppositecharges);

3. (a) diode (accept LED);

(b)

zero/v. small current for negative voltage values;

correct shape for positive values of voltage;

(c) can change the resistance of a variable resistor or variable resistor can change current/voltage (or the

converse);

(d) 6 volts;

(e) 6-3.8 = 2.2V;

(f) 40mA for both;

4. (a) converts milliamps to amps;

substitution into correct equation and rearrangement to find 5077;

(one mark for 5.077 )

(b) 1-2 marks:

resistance of A decreases with T or A is a thermistor;

resistance of B increases with T or B is a filament lamp;

3-4marks:both relationships are non-linear;

for A largest slope (or rate of change) is at lower T OR for B largest slope is at a higher T

more results for B / fewer results for A

range of values for both is similar;


17/17

Part B

1.

2. (a) AC;

takes positive and negative values;

(b) cell/battery;

(c) B;

3. use of I=Q/t;

0.047 s;

4. (a) use of P=IV;

0.021 A;

(b) use of P=E/t;

t= 10833 s = 181 min = 3.0 hours;

5. they all have the same charge/negative;

like charges repel;

6. (a) Any two from:

negative charge move or electrons move;

charge moves from plate B to sheet A;

therefore produces unbalanced/net charge on A/B;

A has gained electrons or B has lost electrons;

(b) 1-2 marks:

top of dust becomes positivenegative charge on A attracts dust

3-4 marks:

force of attraction > weight of dust

idea of charge separation on dust (overall charge is zero)

this is called charging by induction

edecel gcse physics p2 topic 1 and topic 2 ts test 13_14

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