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Circuits Full Topic Quiz KDD

Total questions: 62

Worksheet time: 1hrs 9mins

Name
Class
Date
1.

Which lights would turn on if your closed switches 1 and 2?

a)

red, blue, and white

b)

red and white

c)

red and blue

d)

blue, white, yellow

2.

In order to produce ONLY LIGHT energy, which switch(es) would you need to close?

a)

switch 1 and switch 2

b)

switch 1, 2, and 3

c)

switch 2 and switch 3

d)

switch 1 and 3

3.

Why does the following circuit not work?

a)

The light bulb is broken

b)

The switch is closed

c)

The wood block is an insulator

d)

The battery is dead

4.

This is the symbol for a...

a)

Thermistor

b)

Bulb

c)

Fixed Resistor

d)

Ammeter

5.

This is the symbol for a...

a)

Motor

b)

Ammeter

c)

Bulb

d)

Voltmeter

6.

This is the symbol for a...

a)

Light Dependent Resistor

b)

Light Emitting Diode

c)

Thermistor

d)

Cell

7.

This is the symbol for a...

a)

Light Emitting Diode

b)

Fuse

c)

Fixed Resistor

d)

Variable Resistor

8.

This is the symbol for a...

a)

Bulb

b)

Voltmeter

c)

Ammeter

d)

Motor

9.

This is the symbol for a...

a)

Light Emitting Diode

b)

Light Dependent Resistor

c)

Fuse

d)

Cell

10.

This is the symbol for a...

a)

Fuse

b)

Cell

c)

Fixed Resistor

d)

Variable Resistor

11.

This is the symbol for a...

a)

Fuse

b)

Wire

c)

Light Emitting Diode

d)

Heater

12.

This is the symbol for a...

a)

Battery

b)

Thermistor

c)

Motor

d)

Fuse

13.

This is the symbol for a...

a)

Thermistor

b)

Fixed Resistor

c)

Variable Resistor

d)

Fuse

14.

The total resistance in this circuit is

a)

9 ohms

b)

450 ohms

c)

150 ohms

d)

50 ohms

15.
As resistors are added in series to a circuit, the total resistance will...
a)
increase
b)
decrease
c)
stay the same
16.
As the resistance of a circuit increases, the current will...
a)
increase
b)
decrease
c)
stay the same
17.

The total resistance of this circuit is

a)

90 or less ohms

b)

45 or less ohms

c)

180 or less ohms

d)

315 or less ohms

18.
A material in which electrons are not able to move easily 
a)
Circuit 
b)
Insulator 
c)
Resistance 
d)
Conductor
19.
A material in which electrons are able to move easily
a)
Circuit
b)
Insulator 
c)
Resistance 
d)
Conductor 
20.
a)
Series circuit - Bulbs are lit
b)
Series circuit - Bulbs are off
c)
Parallel circuit - Bulbs are lit
d)
Parallel circuit - Bulbs are off
21.
a)
Bulbs are in parallel - Circuit X is brighter than Circuit Y
b)
Bulbs are in parallel - Circuit Y is brighter than Circuit X
c)
Bulbs are in series - Circuit X is brighter than Circuit Y
d)
Bulbs are in series - Circuit Y is brighter than Circuit X
22.
a)
A2 = A3
b)
A2 + A3 = A1
c)
A1 + A2 = A3
d)
A4 = A2 - A3
23.

In a thermistor, the resistance is high when the (a)   is low.

24.

Select the correct shape for the graph of a thermistor or an LDR.

a)
b)
c)
d)
25.

The resistance of a thermistor increases when its temperature increases

a)

TRUE

b)

FALSE

26.

The resistance of a light dependent resistor increases when the light intensity decreases

a)

TRUE

b)

FALSE

27.

Thermistors are used in (a)   alarms

28.

LDRS are used in (a)   lights

29.

What do the small blue circles in the diagram represent?

(a)  

30.

(a)   is the flow of electrons.

31.

In an electrical wire, as electrons collide with metal ions, they produce (a)   .

32.

In a filament bulb, friction between the electrons and ions causes (a)   energy to transfer from the electrons to the ions.

33.

Select the useful examples of the heating effect.

a)

Toaster

b)

Electric heater

c)

Gas oven

d)

Mobile phone

e)

Kettle

34.
Current is measured in....
a)
Amps 
b)
Volts
c)
Ohms
d)
Coulombs
35.

Which of the following does this graph apply to?

a)

A diode

b)

A fixed resistor

c)

A filament lamp

36.

Which of the following does this graph apply to?

a)

diode

b)

filament lamp

c)

fixed resistor

37.

Which of the following does this graph apply to?

a)

diode

b)

filament lamp

c)

fixed resistor

38.

Which of the following is directly proportional?

a)
b)
c)
39.

Which of the following shows The Heating Effect?

a)
b)
c)
40.

Which of the following shows current travelling in only one direction?

a)
b)
c)
41.

Which colour is live?

a)

Yellow and Green

b)

Blue

c)

Brown

d)

None of them

42.

What is the yellow and green wire called?

a)

Earth

b)

Live

c)

Scary

d)

Neutral

43.

What is mains voltage in the UK?

a)

240V

b)

1.5V

c)

120V

d)

230V

44.

Which images shows the voltage trace for a.c?

a)
b)
45.

What is the name given to the blue wire?

a)

Neutral Wire

b)

Earth Wire

c)

Live Wire (or Hot Wire)

46.

Earth wires are particularly important if the case of an appliance is made of ______

a)

metal

b)

plastic

c)

wood

d)

rubber

47.

Electricity is sent over ............... transmission lines.

a)

low voltage

b)

no voltage

c)

high voltage

48.

National Grid Network consists of

a)

Power stations - step-up transformers - transmission lines - step-down transformers - consumers

b)

Power stations - transmission lines - step-up transformers - consumers - step-down transformers

c)

Power stations - step-down transformers - transmission lines -step-up transformers - consumers

d)

Power stations - step-up transformers - consumers - transmission lines - step-down transformers

49.

What is the advantage of electricity transmission at high voltage?

a)

Increase the energy

b)

High current flow

c)

Reduce the heat dissipated in the electrical cable

d)

Reduce the resistance of transmission cable

50.

Diagram shows a National Grid Network to transmit electricity. The energy dissipated during the transmission can be reduced by

a)

Using high resistivity cable

b)

Using high current

c)

Using low density cable

d)

Using high voltage

51.
Step-up transformers...
a)
improve the efficiency of the national grid
b)
reduce the voltage to a safe level for the home
c)
both 
52.
Step-down transformers...
a)
improve the efficiency of the national grid
b)
reduce the voltage to a safe level for the home
c)
both 
53.

A transformer consists of

a)

Metal Core

b)

Metal core and coiled wire

c)

Metal core and polymer wire

d)

Polymer core and metal wire

54.

Step-up transformer is a transformer that increases...

a)

voltage.

b)

current.

c)

resistance.

d)

conductance.

55.

A secondary coil of a transformer has 500 windings. It was supplied with 200 V. How many windings needed at primary coil to produce 100 V.

(a)  

56.

Why transformers work with A.C. current but not D.C.

a)

A.C current produces changing magnetic field.

b)

D.C current produces changing magnetic field.

c)

D.C current is weak

d)

A.C current is powerful

57.

Which of the following does not change in a transformer?

a)

Voltage

b)

Current

c)

Power

d)

Frequency

58.

This picture is an example of a ________________.

a)

Motor

b)

Generator

c)

Step-up transformer

d)

Step-down transformer

59.

A step up transformer _____________.

a)

decreases voltage

b)

decreases current

c)

increases power

d)

increases frequency

60.

Power is how much energy changes every (a)   .

61.

The unti of power is (a)   .

62.

The unit of energy transfer is Joules.

a)

True

b)

False

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