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ELECTRONICS 3º ESO

Total questions: 50

Worksheet time: 1hrs 15mins

Name
Class
Date
1.

ELECTRONIC COMPONENT

a)

TRANSISTOR

b)

CAPACITOR

c)

DIODE

d)

RELAY

2.

Is a

type of magnet whose

magnetic field is produced

by the flow of electric

current.

a)

MAGNET

b)

ELECTROMAGNET

c)

RELAY

d)

SWITCH

3.

COMPLETE: Most electric motors

operate through

interacting _____________

___________ and current-

carrying conductors

to generate force,

a)

ELECTRIC CURRENT

b)

MAGNETIC FIELDS

c)

ELECTRONS AND PROTONS

d)

RESISTANCE AND VOLTAGE

4.

THE NAME OF THIS COMPONENT IS ...

a)

DIODE

b)

RESISTOR

c)

LED

d)

FUSE

5.

ELECTRONIC COMPONENT

a)

TRANSISTOR

b)

SWITCH

c)

DIODE

d)

RELAY

6.

SYMBOL OF ...

a)

TRANSISTOR

b)

PHOTORESISTOR

c)

THERMISTOR

d)

RESISTOR

7.

A RESISTOR yellow-red-orange-silver VARIES BETWEEN...

a)

46200-37800 Ohms

b)

45000-38000 Ohms

c)

42000-38000 Ohms

d)

40000-30000 Ohms

8.

SYMBOL OF ...

a)

LED

b)

TRANSISTOR

c)

RELAY

d)

BATTERY

9.

IF WE CLOSE THE SWITCH ...

a)

THE MOTOR WILL NOT ROTATE

b)

THE CAPACITOR WILL BE DISCHARGED

c)

THE CAPACITOR WILL BE CHARGED

d)

THE MOTOR WILL STOP ROTATING

10.

SYMBOL OF

a)

POTENTIOMETER

b)

RESISTOR

c)

THERMISTOR

d)

PHOTORESISTOR

11.

A NTC THERMISTOR WORKS

a)

AS TEMPERATURE RAISES RESISTANCE RAISES

b)

AS TEMPERATURE DECREASES RESISTANCE DECREASES

c)

AS TEMPERATURE RAISES RESISTANCE DECREASES

d)

AS TEMPERATURE DECREASES RESISTANCE STAYS

12.

SYMBOL OF...

a)

THERMISTOR NTC

b)

THERMISTOR PTC

c)

TRANSISTOR PTC

d)

POTENTIOMETER

13.

WHEN CLOSE AND OPEN THE SWITCH AGAIN ...

a)

THE BULB WILL CONTINUE WORKING FOR A TIME PERIOD

b)

THE BULB WILL NOT CONTINUE WORKING

c)

THE BULB WILL CONTINUE WORKING

d)

THE BULB NEVER WILL WORK

14.

ELECTRONIC COMPONENT

a)

POTENTIOMETER

b)

RELAY

c)

TRANSISTOR

d)

THERMISTOR

15.

COMPONENT

a)

POTENTIOMETER

b)

RESISTOR

c)

LED

d)

DIODE

16.

ELECTRONIC COMPONENT

a)

CONDENSER

b)

CAPACITOR

c)

RESISTOR

d)

DIODE

17.

WHEN CLOSING THE SWITCH ...

a)

THE RELAY WILL ATRACCT CONTACTS

b)

THE LIGHT WILL STOP WORKING

c)

THE ELECTROMAGNET WILL STOP WORKING

d)

THE CONTACTS WILL NOT CHANGE

18.

ELECTRONIC COMPONENT

a)

CAPACITOR

b)

THERMISTOR

c)

DIODE

d)

RESISTOR

19.

A PTC THERMISTOR WORKS

a)

AS TEMPERATURE RAISES RESISTANCE RAISES

b)

AS TEMPERATURE DECREASES RESISTANCE DECREASES

c)

AS TEMPERATURE RAISES RESISTANCE DECREASES

d)

AS TEMPERATURE DECREASES RESISTANCE STAYS

20.

ELECTRONIC COMPONENT

a)

LED

b)

PHOTORESISTOR

c)

THERMISTOR

d)

CONDENSER

21.

THE ELECTRICITY PRODUCED BY BATTERIES IS ...

a)

ALTERNATING CURRENT

b)

DIRECT CURRENT

c)

NATURAL CURRENT

d)

STATIC CURRENT

22.

IN ALTERNATING CURRENT, THE ELECTRONS ...

a)

FLOW VERY FAST

b)

REVERSES DIRECTION

c)

FLOW IN ONE DIRECTION

d)

MOVE ALTERNATING CHARGE

23.

TWO TYPES OF ELECTRIC CURRENT ARE ...

a)

DIRECT AND ALTERNATING

b)

ALTERNATING AND CONTINUOUS

c)

CONTINUOUS AND VARIABLE

d)

VARIABLE AND DIRECT

24.

A

device that converts mechanical energy into electrical

energy.

a)

transformer

b)

generator

c)

motor

d)

transistor

25.

THIS IS THE SYMBOL OF ...

a)

POTENTIOMETER

b)

VARIABLE RESISTOR

c)

RESISTOR

d)

FUSE

26.

A machine

designed to convert

electric energy into

useful mechanical

motion.

a)

GENERATOR

b)

TRANSFORMER

c)

DYNAMO

d)

MOTOR

27.

ELECTRONIC COMPONENT

a)

POTENTIOMETER

b)

TRANSISTOR

c)

CONDENSER

d)

THERMISTOR

28.

Is a two-terminal passive

electronic component which

implements electrical resistance as

a circuit element.

a)

TRANSISTOR

b)

RESISTOR

c)

POTENTIOMETER

d)

DIODE

29.

SYMBOL OF ...

a)

FUSE

b)

TRANSISTOR

c)

RELAY

d)

TWO WAY SWITCH

30.

Is a three-terminal resistor with a

sliding contact that forms an adjustable voltage divider.

a)

RESISTOR

b)

LDR

c)

THERMISTOR

d)

POTENTIOMETER

31.

A type of

resistor whose resistance

varies significantly with

temperature.

a)

PHOTORESISTOR

b)

THERMISTOR

c)

POTENTIOMETER

d)

LDR

32.

A

resistor whose resistance decreases with increasing

incident light intensity.

a)

LED

b)

LDR

c)

PTC

d)

NTC

33.

A device for

storing electric charge.

a)

TRANSISTOR

b)

STORE BATTERY

c)

CAPACITOR

d)

PHOTORESISTOR

34.

THE FOLLOWING COMPONENTS ARE MADE WITH SEMICONDUCTOR MATERIALS

a)

RESISTOR AND LED

b)

DIODE AND TRANSISTOR

c)

CAPACITOR AND TRANSISTOR

d)

THERMISTOR AND POTENTIOMETER

35.

THE THREE TERMINALS OF A TRANSISTOR ARE CALLED:

a)

BASE, EMITTER AND POLE

b)

BASE, COLLECTOR AND RECEPTOR

c)

COLLECTOR, EMITTER AND RECEPTOR

d)

BASE, COLLECTOR AND EMITTER

36.

A DIODE PERMITS THE FLOW OF INTENSITY FROM ...

a)

ANODE TO CATHODE

b)

CATHODE TO ANODE

c)

ANODE TO TERMINAL

d)

CATHODE TO TERMINAL

37.

IF WE CLOSE THE SWITCH ...

a)

THE LED WON´T WORK

b)

THE LED WILL WORK

c)

THE CURRENT THROUGH THE BASE IS TOO BIG

d)

THE CAPACITOR WILL WORK AND THE LED WILL LIGHT

38.

THIS IS THE SYMBOL OF ...

a)

LED

b)

RESISTOR

c)

TRANSISTOR

d)

DIODE

39.

THE TRANSISTOR WILL NOT WORK BECAUSE ...

a)

BASE CURRENT IS TOO LOW

b)

COLLECTOR CURRENT IS HIGH

c)

BASE CURRENT IS TOO HIGH

d)

EMITTER CURRENT IS VERY LOW

40.

A LED IS A TYPE OF DIODE ...

a)

WHICH RECEIVES LIGHT

b)

WHICH PRODUCES LIGHT

c)

WHICH WORKS WITH LIGHT

d)

WHICH NEEDS LIGHT TO WORK

41.

WHEN WE CLOSE THE SWITCH ...

a)

THE LED WILL LIGHT

b)

THE LED WILL NOT LIGHT

c)

THE CURRENT WILL FLOW THROUGH THE LED

d)

THE TRANSISTOR WILL WORK

42.

A two-terminal electronic component that

conducts electric current in only one direction.

a)

DIODE

b)

CAPACITOR

c)

POTENTIOMETER

d)

THERMISTOR

43.

WHEN THE SWITCH IS CLOSED ...

a)

IF TEMPERATURE INCREASES, THE LIGHT WILL BE HIGHER

b)

IF TEMPERATURE INCREASES, THE LIGHT WILL BE LOWER

c)

IF TEMPERATURE DECREASES, THE LIGHT WILL BE HIGHER

d)

TEMPERATURE IS NOT IMPORTANT IN THIS CIRCUIT

44.

OPENING THE SWITCH ...

a)

THE LIGHT STOPS WORKING

b)

THE LIGHT CONTINUE WORKING FOR A TIME PERIOD

c)

THE CAPACITOR WILL BE CHARGED

d)

THE CAPACITOR IS NOT IMPORTANT

45.

A RELAY IS AN ELECTRONIC COMPONENT WHICH ...

a)

WORKS WITH MORE THAN 9 VOLTS

b)

USES A MANUAL SWITCH

c)

HAS THREE TERMINALS TO CONNECT TO VOLTAGE

d)

HAS AN ELECTROMAGNET AND CONTACTS

46.

A POTENTIOMETER ...

a)

IS A RESISTOR WITH TWO TERMINALS

b)

CAN VARY THE RESISTANCE AND HAS THREE TERMINALS

c)

IS A TYPE OF DIODE

d)

HAS ALWAYS THE SAME VALUE ALTHOUGH VOLTAGE CHANGES

47.

SYMBOL OF ...

a)

PTC

b)

NTC

c)

LED

d)

LDR

48.

MARK THE CORRECT SENTENCE

a)

THERE IS A THERMISTOR TYPE NTC

b)

THE ELECTRONIC COMPONENT IS A LDR

c)

WHEN CLOSING THE CIRCUIT, THE RESISTANCE WILL INCREASE

d)

WHEN CLOSING THE CIRCUIT, THE RESISTANCE WILL DECREASE

49.

A TRANSISTOR IS MADE WITH ...

a)

ELECTRONIC MATERIALS

b)

CONDUCTOR MATERIALS

c)

SEMICONDUCTOR MATERIALS

d)

INSULATOR AND CONDUCTOR MATERIALS

50.

A SIMPLE DEFINITION OF ELECTRICITY CAN BE ....

a)

MOVEMENT OF ELECTRONS

b)

MOVEMENT OF PROTONS FROMS ONE ATOM TO ANOTHER

c)

MOVEMENT OF ELECTRIC CHARGES

d)

MOVEMENT OF ATOMS

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