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Worksheets

Electronics and Communication Engineering

Total questions: 120

Worksheet time: 2hrs 30mins

Name
Class
Date
1.

What is the full form of IoT?

a)

Internet of Technology

b)

Incorporate of Things

c)

Internet of Things

d)

Incorporate of Technology

2.

What is IoT?

a)

network of physical objects embedded with sensors

b)

network of virtual objects

c)

network of objects in the ring structure

d)

network of sensors

3.

Who coined the term “Internet of Things”?

a)

Kevin Aston

b)

John Wright

c)

Edward Jameson

d)

George Garton

4.

When was the actual term “Internet of Things” coined?

a)

1998

b)

1999

c)

1987

d)

1978

5.

Which of the following is false about IoT devices?

a)

IoT devices use the internet for collecting and sharing data

b)

IoT devices need microcontrollers

c)

IoT devices use wireless technology

d)

IoT devices are completely safe

6.

Which of the following is not an IoT platform?

a)

Amazon Web Services

b)

Microsoft Azure

c)

Salesforce

d)

Flipkart

7.

Which of the following is not an application of IoT?

a)

BMP280

b)

Smart home

c)

Smart city

d)

Self-driven cars

8.

Which of the following is not a fundamental component of an IoT system?

a)

Sensors

b)

Connectivity and data processing

c)

User interface

d)

Transformer

9.

Which of the following is used to capture data from the physical world in IoT devices?

a)

Sensors

b)

Actuators

c)

Microprocessors

d)

Microcontrollers

10.

What IoT collects?

a)

Device data

b)

Machine generated data

c)

Sensor data

d)

Human generated data

11.

What is embedded in a device to read data from the world around it?

a)

sensors

b)

camera

c)

wires

d)

Internet

12.

Devices connected to the Internet...

a)

transmit data

b)

store data

c)

receive data

d)

delete data

13.

The IoTP stands for...

a)

Internet of Things Platform.

b)

Internet of Things Processes.

c)

Internet of Things Process.

d)

Internets of Thing Platform.

14.

In order to work, IoTP needs to collect ____________ from the connected devices.

a)

friend requests

b)

data

c)

likes

15.

What brings together all the gathered information and provides a common language?

a)

Internet of Things Sorter

b)

Internet of Things Platform

c)

Internet of Things Provider

d)

Internet of Things Helper

16.

IoT requires sophisticated sensors and computer chips that... (Choose 2 answers)

a)

transmit data to the IOTP over a secure channel.

b)

read data from the surrounding environment.

c)

are built into physical things.

d)

transmit data to the IOTP over a non-secure channel.

e)

are placed close to physical things.

17.

What does the Internet of Things platform do?

a)

Deletes the data coming from various devices.

b)

Integrates the data coming from various devices.

c)

Sorts the data coming from various devices.

18.

The IoTP ... (Choose 4 answers)

a)

transmits important data to the industry.

b)

sends all the data to the industry.

c)

filters the most important data from all the data received.

d)

receives different types of data values from different devices.

e)

provides a common language for different devices to be able to work together.

19.

When the industry receives the data sent from the IoTP worldwide, it uses this data to... (Choose 4 answers)

a)

create better products in the future.

b)

help the customer use the product.

c)

fix the problems their product is facing (updates).

d)

create a bank account for the product's sale profit.

e)

pinpoint problems in the production line.

20.

A car is example of an object that can be part of the Internet of Things. True or False?

a)

True

b)

False

21.

The car's manufacturer can use the data received to improve the car's design. True or False?

a)

False

b)

True

22.

With the use of Internet of Things, ... (Choose 2 answers)

a)

a manufacturer cannot repair more than 3 faults at one go.

b)

a manufacturer can order the required parts to be used to make the repairs.

c)

a manufacturer can set up an appointment to repair the fault.

23.

The IoT things can help a manufacturer... (Choose 2 answers)

a)

identify a faulty part from the data gathered.

b)

dispose of a faulty part.

c)

gather data on the type of usage of the device.

24.

IoT stands for?

a)

Internets of Thing

b)

Intranet of Things

c)

Intranets of thing

d)

Internet of Things

25.

Internet of Things is the evolution of _______________ connected to the Internet.

a)

cars, mobiles, and desktop computers

b)

mobiles, homes and embedded applications

c)

mobiles, streets, applications

26.

In the near future IoT will be made up of...

a)

hundreds of billions of devices

b)

billions of devices

c)

hundreds of millions of devices

d)

a single device

27.

Internet of Things combines

a)

computer capabilities and data analytics

b)

computer portability and data sorting

c)

computer specifications and data retrieval

28.

The devices in the IoT are connected...

a)

to the server.

b)

to the Internet.

c)

directly to one another.

29.

What is the main advantage of the Internet of Things?

a)

The sharing of data coming from different devices

b)

Having an Internet connection everywhere you go

c)

The sharing of devices between users

30.

The IoT can receive data from various devices. What is done with that data to receive benefit from it?

a)

Delete the data

b)

Analyse the data

c)

Sort the data

31.

Analytics is...

a)

the connection between networked computers.

b)

the software used to create games.

c)

the study of data.

32.

When IoT devices are communicating together, these form...

a)

an intelligent system.

b)

a big device.

c)

an android.

d)

a robot.

33.

Select examples where IoT can help humans: (Choose 4 answers.)

a)

Citywide traffic system

b)

Checking the weather conditions

c)

Keeping record of my books

d)

The automation of home applications

e)

The control of road traffic

34.

What are the two types of bipolar junction transistors?

a)

npn and pnp

b)

pnn and nnp

c)

ppn and nnp

d)

pts and stp

35.

There are h- parameters of a transistor

a)

two

b)

four

c)

three

d)

none of the

above

36.

A dual-gated MOSFET is

a)

a depletion

MOSFET.

b)

an enhancement

MOSFET.

c)

a VMOSFET.

d)

either a

depletion or an enhancement MOSFET.

37.

Which of the following devices has the highest input resistance?

a)

diode

b)

JFET

c)

MOSFET

d)

bipolar

junction transistor

38.

In an npn transistor, the majority carriers in the emitter are

a)

free electrons

b)

holes

c)

neither

d)

both

39.

When a transistor is used as a switch, it is stable in which two distinct regions?

a)

saturation and active

b)

active and cutoff

c)

saturation and cutoff

d)

none of the

above

40.

A transistor data sheet usually identifies βDC as

a)

hre.

b)

hfe.

c)

IC.

d)

VCE.

41.

What is the ratio of IC to IE?

a)

βDC

b)

βDC / (βDC + 1)

c)

αDC

d)

either βDC /(βDC + 1) or αDC, but not βDC

42.

For a JFET, the change in drain current for a given change in gate-to- source voltage, with the drain-to-source voltage constant, is

a)

breakdown.

b)

reverse

transconductance.

c)

forward

transconductance.

d)

self-biasing.

43.

For normal operation of a pnp BJT, the base must be with

respect to the emitter and with respect to the collector

a)

positive, negative

b)

positive,

positive

c)

negative,

positive

d)

negative,

negative

44.
1. The resistivity of a semiconductor lies between 
a)
(a)10 -6 Ωm to10-8 Ωm
b)
n(b) 108 Ωm to1014 Ωm
c)
(c) 10 -2 Ωm to104 Ωm
d)
(d) none of these
45.
2. The forbiddenn energy gap for Germanium is of the order of
a)
(a) 0.7 eV
b)
(b) 0.3 eV
c)
(c) 1.1 eV
d)
(d) 10 eV
46.
3. Which of the following is a pentavalent impuity added while forming an extrinsic semiconductor ?
a)
(a) Boron 
b)
Arsenic
c)
Indium
d)
Gallium
47.
The reverse saturation current in a PN Junction diode is only due to 
a)
majority carriers
b)
minority carriers
c)
acceptor ions
d)
donor ions
48.

Doping of Semiconductors

a)

materials which can conduct electricity better than insulator, but not as well as conductors.

b)

The process of adding of a certain amount of specific impurities atoms in the pure semiconductor.

c)

when 4 electrons in outermost orbit.

49.

which statement is correct? (the dark circles represent the electrons)

a)

p-type of the diode is connected to the negative terminal.

b)

Electron moves across the p-n junction, makes the diode forward biased

c)

current will not flow in the circuit

d)

reverse biased circuit

50.

The characteristics of p-type semiconductors is includes

a)

Majority carriers are electron

b)

Has tendency to gain electron

c)

Has tendency to donor electron

d)

Easy to conduct electricity

51.

The process of adding an impurity to an intrinsic semiconductor is called

a)

Doping

b)

Ionization

c)

Recombination

d)

Atomic modification

52.

Which of the following statements is NOT the diode application in electronic circuit?

a)

Diode as voltage regulator

b)

Diode as Rectifier

c)

Diode as Amplifier

d)

Diode as solar cell

53.

A full-wave rectifier consist of _______________________________

a)

1 Diode

b)

2 Diode

c)

3 Diode

d)

4 Diode

54.

The minority carriers in P-type silicon are called _________________

a)

Neutron

b)

Proton

c)

Electron

d)

Hole

55.

Basic building blocks of all electronic circuits are

a)

Devices in which there is a flow of electrons

b)

devices in which there is no flow of electrons

c)

devices in which there is a controlled flow of electrons

d)

devices in which there is an uncontrolled flow of electrons

56.

conductivity of semiconductor increases with increase in temperature, because

a)

number density of free charge carriers increases

b)

relaxation time increases

c)

both number density of free charge carriers and relaxation time increases

d)

number density of free charge carriers increases relaxation time decreases but effect of decrease in relaxation time is much less than increase in number density

57.

Let np and ne be the number density of holes and conduction electrons respectively in a semiconductor. Then,

a)

np > ne in an intrinsic semiconductor, I < Ip + Ie

b)

np = ne in an extrinsic semiconductor, I > Ip + Ie

c)

np = ne in an intrinsic semiconductor, I = Ip + Ie

d)

np > ne in an intrinsic semiconductor, I = 0( Here, Ip = current due to holes,Ie= current due to electrons, I= total current)

58.

During formation of p-n junction

a)

an electron diffuses from n to p side

b)

a hole diffuses from p to n side

c)

a hole diffuses from n to p side

d)

an electron diffuses from p to n side

59.

Which of the following statement is incorrect?

a)

The greater the value of quality factor the narrower will be the bandwidth.

b)

The resonant frequency of a series resonant circuit is equal to the geometric mean of half-power frequencies (f1, f2).

c)

The bandwidth of a series resonant circuit is the range of the frequencies for which the circuit current is equal to or greater than 63.7% of the circuit current of resonance.

d)

The bandwidth of a series resonant circuit is the range of the frequencies for which the circuit current is equal to or greater than 70.7% of the circuit current of resonance.

60.

Three resistors of 6Ω are connected in parallel. So, what will be the equivalent resistance?

a)

9Ω

b)

6Ω

c)

18Ω

d)

2Ω

61.

Ohm's law is applicable to

a)

Semi - conductors

b)

Vacuum tubes

c)

Electrolytes

d)

None of these

62.

Which of the following is the correct relation?

a)

Y11 = h11 / h12

b)

Y11 = h11

c)

Y11 = 1 / h11

d)

Y11 = h12

63.

In two - port network, what are the other names of Z parameters?

a)

Short circuit admittance parameter

b)

Open circuit Impedance parameter

c)

Open circuit admittance parameter

d)

Short circuit impedance parameter

64.

Which is used to measure the electric current?

a)

Cell

b)

Ammeter

c)

Battery

d)

Galvanometer

65.

The symbol of Q refers to the

a)

Power quotient

b)

Resonance quotient

c)

Quality factor

d)

Qualification test

66.

In thevenin's theorem, the voltage is equal to

a)

Open circuit voltage

b)

Open circuit current

c)

Short circuit current

d)

Short circuit voltage

67.

Mesh analysis is suitable for

a)

Voltage sources

b)

Current sources

c)

Unilateral elements

d)

Complex elements

68.

The basic laws for electric circuit is

a)

Newtons laws

b)

Einstein's theory

c)

Kirchoff's laws

d)

Faradays laws

69.

An ideal current source should have

a)

Infinite source resistance

b)

Large value of e.m.f

c)

Small value of e.m.f

d)

Zero source resistance

70.

The circuit whose properties are same in either direction is known as

a)

Unilateral circuit

b)

Bilateral circuit

c)

Irreversible circuit

d)

Reversible circuit

71.

In series combination of resistance, the current through each resistance is

a)

Higher in larger resistance

b)

Lower in larger resistance

c)

Same in each resistance

d)

Higher in smaller resistance

72.

There are _____ types of dependent sources.

a)

2

b)

3

c)

5

d)

4

73.

Which of the following is the souce transformation?

a)

Unique

b)

Bilateral

c)

Complicated

d)

Unilateral

74.

What power is deveoped in a resistor of 15 Ω with 96 V across it?

a)

1440 W

b)

614.4 W

c)

138,240 W

d)

21,600 W

75.

What is the effective resistance of a parallel pair of 12 Ω and 18 Ω resistors?

a)

0.1389 Ω

b)

1.5 Ω

c)

7.2 Ω

d)

30 Ω

76.

What is the effective resistance of the circuit shown?

a)

11 Ω

b)

24 Ω

c)

8 1/3 Ω

d)

2.182 Ω

77.

What power is developed in the 9 Ω resistor?

a)

144 W

b)

72 W

c)

16 W

d)

4 W

78.

What power is developed in the 12 Ω resistor?

a)

48 W

b)

72 W

c)

144 W

d)

192 W

79.

What is the power developed in the 250 Ω resistor?

a)

10 W

b)

14 W

c)

24 W

d)

0.2 W

80.

What Law defines the relationship between voltage, current, and resistance in an electric circuit

a)

Kirchhoff's Voltage Law

b)

Kirchhoff's Current law

c)

Ohm's Law

d)

Voltage Divider rule

81.

Convert the binary number 01011 into decimal

a)

10

b)

11

c)

13

d)

12

82.

What is the radix of hexadecimal number?

a)

15

b)

10

c)

16

d)

2

83.

Which bit has the highest weightage?

a)

MSB

b)

LSB

c)

Middle most bit

d)

none

84.

The number 5A6D belongs to which category of number system

a)

Octal

b)

Hexadecimal

c)

Binary

d)

DEcimal

85.

What is the decimal equivalent of the number 7CD.8

a)

1789.3

b)

1987.6

c)

1998.5

d)

1997.5

86.

The number 15 is represented as ............in Hexadecimal.

a)

C

b)

E

c)

F

d)

D

87.

The range of octal number is from......

a)

1 to 8

b)

0 to 7

c)

0 to 9

d)

none

88.

The decimal equivalent of the number 101101.10 is

a)

40.75

b)

45.5

c)

44.5

d)

43.25

89.

The base of octal number is

a)

2

b)

8

c)

10

d)

11

90.

The decimal equivalent of the octal number 523 is

a)

335

b)

533

c)

339

d)

393

91.

Select the correct symbol for a resistor within a circuit diagram

a)
b)
c)
d)
92.

Select the correct symbol for an LED within a circuit diagram

a)
b)
c)
d)
93.

Select the correct symbol for a battery within a circuit diagram

a)
b)
c)
d)
94.

Select the correct symbol for a bulb within a circuit diagram

a)
b)
c)
d)
95.

An LED gives out light in a simple circuit, select the correct component image of an LED

a)
b)
c)
d)
96.

Resistors have coloured bands to show their value, this is the resistance they have in a circuit. But what is resistance measured in?

a)

Millimeters

b)

Inches

c)

Ohms

d)

Centimeters

97.

An resistor restricts the flow or current in a circuit, select the correct component image of a standard resistor

a)
b)
c)
d)
98.

A type of on/off switch used in a simple circuit is a SPST, but what does this stand for?

a)

Single Pole Second Throw

b)

Single Pole Single Throw

c)

Slight Pole Slight Throw

d)

I don't know yet.

99.

Select the correct component image for a SPST switch in a circuit

a)
b)
c)
d)
100.

How does a parallel circuit function?

a)

If one component fails the others will also fail as the current can only flow in one continuous loop.

b)

If one component fails the others will not as the current can still flow in a continuous loop through a second branch.

c)

If one component fails the others will also fail as the resistance is too high.

d)

I don't know yet?

101.
What electronic component allows current to flow in one direction only? 
a)
Resistor
b)
LED
c)
Didode
d)
Switch
102.
What material is a resistor made of?
a)
Graphite
b)
Carbon
c)
Glass
d)
Mica
103.
What type of circuit is the most efficient?
a)
Combination circuit
b)
Series circuit
c)
Parallel circuit
d)
Isometric circuit
104.
Glass is a good conductor.
a)
True
b)
False
105.
Which of the materials is not a good conductor?
a)
Copper
b)
Silver
c)
Aluminum
d)
Mica
106.
a)

Battery

b)

Capacitor

c)

Resistor

d)

Inductor

107.
What is Electricity?
a)
Type of energy that can build up in one place
b)
Type of energy that can flow from one place to another.
c)
Type of energy that can build up in one place OR Type of energy that can flow from one place to another.
d)
None of the Possible Answers Shown
108.

Is a branch of science that deals with the study of the flow and control of electrons

a)

Electronics

b)

Electricity

c)

Power

d)

Static Electricity

109.

LED is

a)

Light Enhancing Diode

b)

Light Emitting Diode

c)

Light Emitting Detector

d)

Light Enhancing Detector

110.

Voltage is measured in

a)

volts

b)

amps

c)

ohms

d)

watt

111.

The unit of charge is _________

a)

Voltage

b)

Ampere

c)

Coulombs

112.

The resistance of a uniform Conductor is directly proportional to the ________of the conductor

a)

Length

b)

Cross Sectional Area

c)

Conductivity

113.

In a material where the resistance INCREASES with an increase in temperature, the material is said to have a ____________

a)

Neutral Temperature Coefficient

b)

Positive Temperature Coefficient

c)

Negative Temperature Coefficient

114.

________ is the capacity of energy

a)

Current

b)

Voltage

c)

Power

115.

You are given a resistor whose stripes are colored from left to right as orange, orange, brown, silver. Find the resistance value.

a)

330 Ohms

b)

33KOhms

c)

3.3 Mega Ohms

116.

What is this ?

a)

Fixed Resistor

b)

Resistor

c)

Variable Resistor

117.

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

118.

Look at this & say What type of source

a)

Current Source

b)

Voltage Source

c)

Independent Source

119.

What is the Name of this source?

a)

Current Source

b)

Resistive Source

c)

Voltage Source

120.

___________is the central part of an atom.

a)

Protons

b)

Neutrons

c)

Nucleus

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