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BasicElectronics

Total questions: 120

Worksheet time: 3600secs

Name
Class
Date
1.
Electronics is the science and technology concerned with regulating flow of:
a)
Heat
b)
Electricity
c)
Water
d)
Power
2.
Electricity is: 
a)
Flowing electrons
b)
Still electrons
c)
voltage x wattage
d)
amps x watts
3.
Choose the true statement below concerning DC currents:
a)
DC stands for Direct Computing and electrons flow in multiple pathways
b)
DC stands for direct current and electrons flow in multiple directions
c)
DC stands for direct current and the electrons do not flow
d)
DC stands for direct current and the electrons flow in only one direction
4.
An expression for the overall power in a circuit is: 
a)
watts
b)
voltage
c)
current
d)
resistance
5.
A tool that measures voltage, current, resistance, and continuity is called a:
a)
voltmeter
b)
resistor
c)
multimeter
d)
screwdriver
6.
In all electronics applications you should never:
a)
Connect power directly to ground.
b)
Offer resistance to the flow of electricity.
c)
Reverse the probes of the multimeter.
d)
none of the above
7.
What does this picture show?
a)
A multimeter
b)
A breadboard
c)
A circuit board
d)
A resistor
8.
A means of fusing together two metal objects to create an electrical connection is called:
a)
soldering
b)
wiring
c)
programming
d)
welding
9.
The correct way to hold this object is like a:
a)
a hammer
b)
a tennis racket
c)
a pencil
d)
a football
10.
The thickness of a wire is called its:
a)
resistance
b)
amperage
c)
thickness
d)
guage
11.
Which color wire is used for ground?
a)
red
b)
black
c)
green 
d)
yellow
12.

Which among these are semiconductor devices

a)

BJT

b)

LED

c)

Zener

d)

Op-Amp

13.

An n type semiconductor is obtained by doping an intrinsic semiconductor with a

a)

Pentavalent impurity

b)

Trivalent impurity

14.

In transistors conduction occurs due to the flow of

a)

Minority charge carriers

b)

Majority charge carriers

c)

Both majority and minority charge carriers

15.

Zener diode is a:

a)

Lightly doped p-n diode

b)

Heavily doped p-n diode

c)

Normally doped p-n diode

d)

None of the above

16.

A junction diode that can operate in reverse breakdown voltage is called:

a)

Schottky diode

b)

Tunnel diode

c)

Junction diode

d)

Zener diode

17.

An Op-Amp can be used to perform mathematical operations.

a)

True

b)

False

18.

Which of the following are active electronic devices

a)

Diodes

b)

Transistors

c)

Resistors

d)

Transformers

19.

A simple diode rectifier has ripples in the output which can be removed by using:

a)

A capacitor in series with the load resistance

b)

A capacitor in parallel with the load resistance

c)

Both the above mentioned combinations will work

d)

None of the above

20.

A signal given to the non-inverting terminal of the op-amp is

a)

Inverted and amplified

b)

Neither inverted nor amplified

c)

Not inverted but amplified

d)

Inverted but not amplified

21.

A transistor has:

a)

One p-n junction

b)

Two p-n junctions

c)

Cannot be determined

d)

Can have any number of junctions based on the operation desired

22.

In a PNP Transistor the majority charge carriers are:

a)

Electrons

b)

Holes

c)

Both holes and electrons

d)

Ions

23.

How many diodes are used in a single phase full wave bridge rectifier?

a)

8

b)

4

c)

2

d)

3

24.

The unit of charge is _________

a)

Voltage

b)

Ampere

c)

Coulombs

25.

________ is the capacity of energy

a)

Current

b)

Voltage

c)

Power

26.

What is this ?

a)

Fixed Resistor

b)

Resistor

c)

Variable Resistor

27.

If the volatge is 20V and the current flowing through the circuit is 2 mA . What is the resistance?

a)

100 Ohms

b)

1 K Ohms

c)

10k Ohms

28.

What is the Name of this source?

a)

Current Source

b)

Resistive Source

c)

Voltage Source

29.

___________is the central part of an atom.

a)

Protons

b)

Neutrons

c)

Nucleus

30.

These are materials that have excellent current carrying capacity.

a)

Semiconductor

b)

Conductors

c)

Insulators

d)

Diodes

31.

These are materials that have no current carrying capacity.

a)

Semiconductor

b)

Conductors

c)

Insulators

d)

Diodes

32.

These are materials that have a conductivity between a good conductor and an insulator.

a)

Semiconductor

b)

Conductors

c)

Insulators

d)

Diodes

33.

Examples of Semiconductor.

a)

Rubber

b)

Silver

c)

Transistors

d)

Silicon

34.

Majority Carrier in a P-type Semiconductor.

a)

Acceptor Ion

b)

Donor Ion

c)

Positive Charge

d)

Negative Charge

35.

Potential barrier of a Silicon.

a)

0.1 V

b)

0.3 V

c)

0.7 V

d)

.10 V

36.

Which of the following does not belong to the group.

a)

Zero Bias

b)

Forward Bias

c)

Reverse Bias

d)

Neutral Bias

37.

In a forward bias condition, when the applied voltage is more than the potential barrier of this PN junction the resistance that is offered by the depletion region negligible.

a)

True

b)

False

38.

In a reverse bias condition, the depletion region offers more resistance to these majority carriers.

a)

True

b)

False

39.

A zener diode has ______ pn junction/s.

a)

One

b)

Two

c)

Three

d)

None

40.

The application of external voltage across the two terminals.

(a)  

41.

What is the most common semiconductor material used for producing integrated circuits

a)

Quartz

b)

Silicon

c)

Diamond

d)

Tantalum

42.
Name this electronic component
a)
Capacitor
b)
Fixed Resistor
c)
Potentiometer
d)
Transistor
43.

what is a diodes function

a)

allows current to flow in one direction

b)

allows current to flow in two directions

c)

is a resistor

44.

when a Diode is used as a half wave rectifier ....

a)

It rectifies only one half of the input AC signal

b)

It rectifies both the halves of the input AC signal

45.

The number of diodes used to build a bridge rectifier

a)

1

b)

2

c)

3

d)

4

46.

The two legs of the diode are ________________ and _______________

(a)  

47.

Which image shows the output of a sine-wave after it has gone through a diode? (Half-wave rectified)

a)
b)
c)
d)
48.

A diode can act as

a)

A Switch

b)

A Rectifier

c)

An Amplifier

d)

All the above

49.

Which one is a 3 terminal device?

a)

Varactor diode

b)

LASER diode

c)

Transistor

d)

LED

50.

BJT is

a)

Bidirectional Junction Transistor

b)

Bipolar Junction Transistor

c)

Bidirectional Junction Transmitter

d)

Bipolar Junction Transmitter

51.

Which one is NPN transistor?

a)
b)
c)
d)
52.

Under normal conditions a diode conducts current when it is

a)

reverse-biased.

b)

forward-biased.

c)

avalanched.

d)

saturated.

53.
Electronics is the science and technology concerned with regulating flow of:
a)
Heat
b)
Electricity
c)
Water
d)
Power
54.
Electricity is: 
a)
Flowing electrons
b)
Still electrons
c)
voltage x wattage
d)
amps x watts
55.
The symbol for voltage is: 
a)
Vo
b)
V
c)
W
d)
Amp
56.
Current is measured in:
a)
Ohms
b)
Voltage
c)
Amperes
d)
Watts
57.
An expression for the overall power in a circuit is: 
a)
watts
b)
voltage
c)
current
d)
resistance
58.
Identify this tool
a)
Electric screw driver 
b)
Electric soldering iron
c)
Electric drill
d)
Electric punch
59.
Identify this tool
a)
Digital multimeter
b)
Digital therometer
c)
Digital pedometer
d)
Digital weight scale
60.

For a silicon P-N junction, the barrier potential is about

a)

0.7 V

b)

0.8 V

c)

0.9 V

d)

1.0 V

61.

Which of these colors is NOT used in the resistor value color code?

a)

white

b)

black

c)

violet

d)

pink

62.

Which one is a 3 terminal device?

a)

Varactor diode

b)

LASER diode

c)

Transistor

d)

LED

63.

The truth table shows possible output for ____ gate.

a)

NOT

b)

AND

c)

OR

d)

NAND

64.

The given truth table belongs to which logic gate?

a)
XOR
b)
NAND
c)
NOR
d)
NOT
65.

Which device is commonly used in electronic circuits to stores electric charge?

a)

Inductor

b)

Potentiometer

c)

Capacitor

d)

Diodes

66.
Which statement describes a vector?
a)
It has magnitude but no direction
b)
It has direction but no magnitude
c)
It has both direction and magnitude
d)
It has constant magnitude but no
 direction
67.
An object will weigh more on
a)
Mars
b)
Earth
c)
Jupiter
d)
the moon
68.

________ is the ability to store electricity in an electric field

a)

impedance

b)

capacitance

c)

polarity

69.

__________ is when something has either a positive or negative electrical charge.

a)

impedance

b)

rectification

c)

polarity

70.

__________measure the pace at which polarity changes.

a)

ampere

b)

ohm

c)

hertz

71.

____________is a piece of equipment that changes the voltage of electricity.

a)

polarity

b)

transformer

c)

hertz

72.

________is a flow of electrical current moving in one direction.

a)

direct current

b)

reactance

c)

inductance

73.

The process of switching AC to DC is called ____________

a)

polarity

b)

rectification

c)

reactance

74.

The flow of electricity is called ____________

a)

circuit

b)

current

c)

ohm

75.

The particle in an atom that carries electric current is called__________________

a)

electron

b)

ohm

c)

watt

76.
a)
b)
c)
d)
77.
a)
b)
c)
d)
78.
a)
b)
c)
d)
79.
a)
b)
c)
d)
80.
a)
b)
c)
d)
81.
a)
b)
c)
d)
82.
a)

Capacitors

b)

Resistors

c)

Inductors

d)

Batteries

83.
a)

Battery

b)

Capacitor

c)

Resistor

d)

Inductor

84.

This is a

a)

Resistor

b)

Capacitor

c)

Diode

d)

Battery

85.

This is a

a)

Resistor

b)

Battery

c)

Inductor

d)

Diode

86.

These are

a)

Inductors

b)

Resistors

c)

Capacitors

d)

Leds

87.

This is an

a)

Inductor

b)

Transformer

c)

Spring

d)

Coil

88.

This is a

a)

Motor

b)

Transistor

c)

Relay

d)

Buzzer

89.

These are

a)

Resistors

b)

Transistors

c)

Diodes

d)

Leds

90.

There are

a)

transformers

b)

pushbutton

c)

relays

d)

switches

91.

This is a

a)

Motor

b)

Transformer

c)

Battery

d)

Buzzer

92.

This is a

a)

Oscilloscope

b)

Screwdriver

c)

Multimeter

d)

Milimeter

93.

This is a

a)

Board

b)

Protoboard

c)

Tablet

d)

Whiteboard

94.

This is an

a)

Multimeter

b)

Oscilloscope

c)

Controller

d)

PLC

95.

Under normal conditions a diode conducts current when it is

a)

reverse-biased.

b)

forward-biased.

c)

avalanched.

d)

saturated.

96.
What is the output of an OR gate if the inputs are 1 and 0?
a)
0
b)
1
c)
OFF
d)
2
97.
What is the output of an AND gate if the inputs are 1 and 0?
a)
ON
b)
2
c)
1
d)
0
98.
A NOT gate has…
a)
Two inputs and one output
b)
One input and one output
c)
One input and two outputs
d)
Two inputs and two outputs
99.
An OR gate has
a)
Two inputs and one output
b)
One input and one output
c)
One input and two outputs
d)
Two inputs and two outputs
100.
A logic state can only be….
a)
On or 1
b)
Off or 1
c)
1 or 0
d)
In and Out
101.
The output of a ________ gate is only 1 when both inputs are 1.
a)
OR
b)
NOT
c)
NAND
d)
AND
102.
What logic gate is this?
a)
AND
b)
OR 
c)
NOT
d)
TO
103.
What gate is this table for?
a)
AND
b)
OR
c)
NOT
d)
NOR
104.

Which logic gate is this?

a)

AND

b)

OR

c)

XOR

d)

NOT

105.

What will the circuit's output be?

a)

1

b)

0

106.
What kind of gate is this?
a)
NOR
b)
NAND
c)
OR
d)
XOR
107.

what is the meaning of rectification?

a)

a process of smoothing using a capacitor

b)

a process of adding impurities to pure materials

c)

a process of converting an alternating current into a direct current by using a diode.

108.

The name of this component:

a)

resistor

b)

capacitor

c)

photocell

d)

transistor

109.

The name of this component:

a)

resistor

b)

LED

c)

photocell

d)

source

110.

The name of this component:

a)

transistor

b)

conductor

c)

555 timer

d)

potentiometer

111.

The image is the symbol for a:

a)

LED

b)

resistor

c)

diode

d)

conductor

112.

The following is a symbol for a:

a)

resistor

b)

diode

c)

transistor

d)

potentiometer

113.

The image is a symbol for a:

a)

diode

b)

LED

c)

source

d)

photocell

114.

The image is the symbol for a:

a)

diode

b)

capacitor

c)

LED

d)

555 Timer

115.

The function of this component is to:

a)

vary the amount of resistance

b)

hold electrical charge

c)

allow current to pass in only one way

d)

act as an electrical switch

116.

The advantage of LED is

a)

Long life

b)

Fast on-off switching

c)

Low operating voltage

d)

All of the above

117.

Identify the electronic component.

a)

Speaker

b)

Capacitor

c)

Battery source

d)

Buzzer

118.

What is the flow of electricity?

a)

Conduct

b)

Charge

c)

Current

d)

Ampere

119.

What is ohm?

a)

Measures electrical resistance

b)

Measure electricity

c)

Bob esponja

d)

Measues circuits

120.

What is the name of an object that opposes to electrity?

a)

Circuit

b)

Resistance

c)

Electron

d)

Current

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