P5 Electric CircuitsName:- Target grade:-

CAG:- Question overview

Question Topic Mark % Grade DateP5c (i) Resistance /6P5g (i) Generators and

electromagnetic induction /3

P5f (i) Transformers /4P5b (i) Current & voltage in series

and parallel circuits /3

P5cm(i) Calculations & maths /2P5b(ii) Current & voltage in series

and parallel circuits /3

P5h (i) Motors /3

P5b(iii) Current & voltage in series and parallel circuits /5

P5e (i) Power /2P5hsw(i) How science works /2

P5a (i) Static electricity /6P5cm(ii) Calculations & maths /3P5b(iv) Current & voltage in series

and parallel circuits /2

P5d(iii) Resistors /3P5hsw(ii) How science works /4P5f(ii) Transformers /2P5g(ii) Generators /3P5h(ii) Motors /3

Colour code each subtopic using pencils, on target = orange, above = green, below = red.

P5d i 13Jan4

Diane investigates how the resistance of a wire changes with the length of wire. She uses this circuit.

Here are her results:

Discuss Diane’s comments and explain the shape of her graph.The quality of written communication will be assessed in your answer.

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4g i. 13Jan5ab

Ali does an experiment using a coil of wire and a magnet.He connects the coil of wire to a data logger.He then drops the magnet through the coil.

Ali displays the data as a graph showing how the voltage across the coil changes with time.

a) Why is there a voltage across the coil?

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b) This effect described in part (a)is used in power stations to produce electricity. Compare the electricity produced by a power station with the electricity produced in this experiment. Use information from the graph

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4fi 13Jan5c

c) The same effect is also used in transformers. (i) What can transformers do? Complete the sentence. Draw one line to connect the correct start of the sentence to the correct end of the sentence

(ii) The diagram below shows the basic construction of a transformer

Complete the sentences below to describe how the transformer works.

Choose the correct letters from the list. One of the letters will not be used

A ........................... causes a ..................... which causes

a ........................... .

This will induce a ........................... which

causes a ........................... . [3]

P5bi 13Jan6a

Jason sets up the following circuit.

a) He measures the current and potential difference.

Draw a line from each quantity to its best description.

P5cm (i) 13Jan6b

Jason measured the voltage across the lamp to be 1.5 V, and the current through it to be 0.5 A.

Draw a line from each quantity to the correct value.

P5bii

13Jan6c

Jason adds another identical lamp to the circuit, in parallel with

the first one.

State and explain what happens to the readings on the meters.

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P5hi 12Jun4ab

Mike is investigating motors.

(a)Name a device that uses a motor and explain why a motor is

used in this device.

device ............................................................................................................................................................

explain why it uses a motor ...........................................................................................................................

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(b) Mike makes some notes about the motor effect, but misses out some words.

Put a tick (✓) in the box next to each correct choice to complete the sentence.

P5bii 12Jun4c

Mike has one battery, two identical motors and some identical connecting wires.

He connects the components together in two different ways. In one circuit, he finds that both motors run slowly.

In the other circuit, he finds that both motors run faster

(i) Draw the two circuits he used. motors run slowly motors run faster

(ii) Explain why the motors run faster in one circuit

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P5d(ii) 12Jun5ab

Angela is installing some solar-powered lamps in her garden.

They store energy from the Sun during the day and then use it

at night.

(a) Here are some

circuit components.

Draw straight lines

from each circuit

symbol to the

component it

represents and from

the component to

its function.

b) The lamps

automatically turn

on when it becomes dark.

They also have a manual override button to turn the lamp off when it is not wanted.

Which of the components in part (a) is unlikely

to be used in the solar-powered lamp? name of component .........................................................[1]

P5e(i) 12 Jan5c

The manufacturers can choose from two

light sources for the lamps, either LEDs or

filament lamps. The data in the table can

be used to calculate the power of each

source of light.

Use the data in the table to suggest why LEDs are used instead of filament lamps.

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P5hsw(i) 12Jun5d

Angela sets up the solar-powered lamps in her garden.

Each month she measures how

long the solar-powered lamps

remain on at night.

Here is a graph of her data.

Angela concludes that the older

the solar-powered lamps, the less

energy they can store.

Discuss her conclusion with reference to correlation and cause.

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P5a(i) 12Jun6

Tim walks on a nylon carpet wearing shoes with rubber soles. When he touches a metal rail, he feels an

electric shock. Tim is worried about the risk from these electric shocks.

Explain these observations, and discuss what Tim will need to consider to decide the size of the risk.

The quality of written communication will be assessed in your answer.

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P5cm(ii) 13Jun4a

Vikram is building a circuit.

(a) He has a motor that has a resistance of 2400 Ω. The motor works if the current through it is 0.005 A.

Vikram has some 1.5 V batteries. How many batteries will be needed to make the motor work correctly?

number of batteries = .......................................................... [3]

P5b(iii) 13Jun4b

Draw the circuit that Vikram could use to measure the resistance of the motor at different currents.

Part of the circuit has been done for you.

[2]

P5 13Jun3

Judy is investigating three different electrical components, A, B and C.

She changes the temperature of each component and measures the resistance.

She then changes the amount of light on each component and measures the resistance.

a) Use the data to decide what type of component A,B and C are

Component A.................................................. Component B......................................................

Component C .................................................. [3]

P5hsw(ii)

Complete the following table to show whether each statement about Judy’s experiment is true, false

or you cannot tell. Put ticks (✓) in the correct boxes.

P5f(ii) 13Jun5

A mobile phone manufacturer is designing a charger for a new phone.

The charger will plug into the 230 V mains supply, and will change the voltage to 12 V.

The charger consists of a transformer with two coils of wire around an iron core.

The table shows two different pairs of coils which could be used in this transformer.

Complete the table.

P5g(ii) P5h(ii) 13Jun6

Motors and generators both contain magnets and coils of wire.

Explain the similarities and differences between a motor and a generator.

The quality of written communication will be assessed in your answer.

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...................................................................................................................................................................................[3+3 = 6]