WorksheetsCommunication Quiz ( 1 - 2 )
Total questions: 90
Worksheet time: 45mins
What is the main difference between Direct Current (DC) and Alternating Current (AC)?
DC flows in both directions, while AC flows in one direction.
DC flows in one direction, while AC changes direction periodically.
DC is used for large-scale power distribution, while AC is used for small-scale applications.
What does Ohm's Law state?
V = IR
P = VI
I = VR
What unit is resistance measured in?
Watts (W)
Volts (V)
Ohms (Ω)
What is the symbol for an inductor?
(R)
(L)
(C)
What is the function of a diode?
Amplify signals
Act as a one-way switch for current
Store energy in a magnetic field
What does a capacitor store?
Electric charge
Magnetic energy
Heat energy
What is a breadboard used for in electronics?
Soldering components permanently
Testing and prototyping circuits without soldering
Connecting high-power components
What is the purpose of an ohmmeter?
Measure resistance
Measure voltage
Measure current
In a series connection of resistors, how is the total resistance (RT) calculated?
RT = R1 + R2 + ...
1/RT = 1/R1 + 1/R2 + ...
RT = R1 × R2 × ...
What type of connection results in an effective resistance that is the sum of individual resistors?
Series connection
Parallel connection
Complex connection
What is the unit of capacitance?
Watts (W)
Farads (F)
Hertz (Hz)
What is the purpose of a Zener diode?
Amplify signals
Act as a voltage regulator
Store energy in a magnetic field
What type of semiconductor material is silicon?
Conductor
Insulator
Semiconductor
How does a P-N junction diode behave in forward bias?
Allows current to flow
Blocks current flow
Acts as an insulator
What is the primary function of a transistor?
Store energy in a magnetic field
Amplify or switch electronic signals
Act as a one-way switch for current
What is the purpose of an oscilloscope?
Measure resistance
Display voltage signals as waveforms
Amplify electronic signals
What does an inverting amplifier using an op-amp do to the input signal?
Amplifies without changing polarity
Amplifies with inverted output
Blocks the input signal
Which component is commonly used to amplify the input signal in electronic circuits?
Capacitor
Inductor
Operational amplifier (Op-Amp)
What is the main advantage of a full-wave rectifier over a half-wave rectifier?
Higher DC output voltage
Lower DC output voltage
Faster switching speed
How is the gain of an inverting amplifier calculated?
Gain = Rf / Rin
Gain = Rin / Rf
Gain = Rf + Rin
What is the purpose of a JFET (Junction Field-Effect Transistor)?
Amplify signals
Act as a voltage regulator
Store energy in a magnetic field
What is the unit of frequency?
Farads (F)
Hertz (Hz)
Ohms (Ω)
What is the purpose of an electrolytic capacitor?
Store energy in a magnetic field
Provide higher capacitance per volume
Act as a voltage regulator
In a non-inverting amplifier using an op-amp, how is the output voltage related to the input voltage?
Output is proportional to the negative input
Output is proportional to the positive input
Output is inversely proportional to the input
What is the core material used in an air core inductor?
Ferrite
Iron
None (air)
What is the primary function of a step-up transformer?
Increase voltage
Decrease voltage
Rectify current
How does a Light Emitting Diode (LED) function?
Generates heat when current flows
Emits light when current flows
Blocks current flow
What is the purpose of a thermal resistor (thermistor)?
Change resistance with temperature
Amplify signals
Store energy in a magnetic field
What is the main function of a step-down transformer?
Increase voltage
Decrease voltage
Rectify current
What does a half-wave rectifier circuit do to an AC input signal?
Passes both halves of the AC wave
Passes only one half of the AC wave
Inverts the AC wave
How is the total resistance calculated in a parallel connection of resistors?
RT = R1 + R2 + ...
1/RT = 1/R1 + 1/R2 + ...
RT = R1 × R2 × ...
What is the primary function of an air core inductor?
Increase inductance
Decrease inductance
Store energy in a magnetic field
What is the purpose of a photo resistor (LDR)?
Change resistance with temperature
Change resistance with light intensity
Amplify signals
Which type of diode permits current to flow in either a forward or reverse mode?
Zener diode
Light Emitting Diode (LED)
PN Junction Diode
What is the unit of inductance?
Farads (F)
Hertz (Hz)
Henry (H)
How does a reverse-biased diode behave?
Allows current to flow
Blocks current flow
Acts as an insulator
What is the purpose of a variable resistor?
Store energy in a magnetic field
Change resistance with temperature
Electric resistance value can be adjusted
What is the primary function of a ferrite core inductor?
Increase inductance
Decrease inductance
Store energy in a magnetic field
How is the output voltage of a non-inverting amplifier using an op-amp related to the input voltage?
Output is proportional to the negative input
Output is proportional to the positive input
Output is inversely proportional to the input
What is the purpose of an AVO meter (multimeter)?
Measure resistance
Measure voltage, current, and resistance
Measure inductance
What does an air core inductor consist of?
Insulated wire wound into a coil
Iron core wrapped with wire
No core material
How does a step-up transformer differ from a step-down transformer?
Step-up increases voltage, step-down decreases voltage
Step-up decreases voltage, step-down increases voltage
Both step-up and step-down increase voltage
What is the main function of a step-down transformer?
Increase voltage
Decrease voltage
Rectify current
What type of resistance increases its value with an increase in temperature?
NTC (Negative Thermal Coefficient) resistance
PTC (Positive Thermal Coefficient) resistance
Variable resistor
What is the purpose of a wire wound resistor?
Act as a voltage regulator
Store energy in a magnetic field
Precise resistance with high power handling
What does a wire wound resistor consist of?
Thin layer of carbon on insulating form
Wires wrapped around a form
Insulated wire wound into a coil
What does a full-wave rectifier circuit use to reduce ripples in the output?
High-capacity capacitor
Inductor
Variable resistor
How is the total resistance calculated in a complex connection of resistors?
RT = R1 + R2 + ...
1/RT = 1/R1 + 1/R2 + ...
RT = R1 × R2 × ...
What does a ceramic capacitor primarily consist of?
Electrolyte material
Ceramic material
Iron core
How is the output voltage of an inverting amplifier using an op-amp related to the input voltage?
Output is proportional to the negative input
Output is proportional to the positive input
Output is inversely proportional to the input
What is the primary function of a light-emitting diode (LED)?
Generate heat when current flows
Emit light when current flows
Block current flow
How does a reverse-biased diode behave?
Allows current to flow
Blocks current flow
Acts as an insulator
What is the unit of capacitance?
Farads (F)
Hertz (Hz)
Henry (H)
What does a breadboard primarily provide in electronics prototyping?
Soldering connections
Temporary and solderless connections
Inductance
What is the primary function of a half-wave rectifier?
Passes both halves of the AC wave
Passes only one half of the AC wave
Inverts the AC wave
How is the total resistance calculated in a parallel connection of resistors?
RT = R1 + R2 + ...
1/RT = 1/R1 + 1/R2 + ...
RT = R1 × R2 × ...
What is the primary function of a ferrite core inductor?
Increase inductance
Decrease inductance
Store energy in a magnetic field
What is the primary function of a router in a network?
Repeat signals
Control and manage network traffic
Connect computers directly
Act as a central hub
Which access technique does FDMA use?
Frequency Division Multiple Access
Time Division Multiple Access
Code Division Multiple Access
Signal Division Multiple Access
What does the term SDH stand for in networking?
Synchronous Digital Hierarchy
Standard Data Hub
Serial Data Handling
System Design Hardware
What is the smallest unit of SDH?
E0
E1
T0
T1
Which network operating system coordinates the activities of multiple computers across a network?
DOS
Windows
MAC
NOS
What is the purpose of a switch in networking?
Regenerate signals
Connect computers in a linear bus
Control and manage network traffic
Act as a repeater
What does the sampling theorem state in analog-to-digital conversion?
The highest frequency in the signal spectrum determines the sample rate.
The signal can be reconstructed from samples at any rate.
Only odd multiples of the highest frequency should be sampled.
The sample rate should be half the highest frequency in the signal spectrum.
Which of the following is a multiplexing technique that uses one frequency for each user all the time?
Frequency Division Multiplexing (FDM)
Time Division Multiplexing (TDM)
Code Division Multiple Access (CDMA)
Amplitude Modulation (AM)
What is the primary purpose of a bridge in networking?
Connect LANs working on different protocols
Repeat signals in a network
Filter content based on MAC addresses
Connect computers in a star topology
What does the term "ATM" stand for in networking?
Automated Teller Machine
Asynchronous Transfer Mode
Advanced Transfer Mechanism
Analog Transmission Module
In networking, what is the purpose of a repeater?
Regenerate signals in a network
Control network traffic
Filter content based on IP addresses
Connect LANs working on different protocols
Which of the following is a network topology that combines characteristics of linear bus and star topologies?
Mesh
Tree
Ring
Point-to-Point
What is the main disadvantage of a linear bus topology?
Requires more cable length than a star topology
If the hub or concentrator fails, nodes attached are disabled
Difficult to configure and wire
Entire network shuts down if there is a break in the main cable
In networking, what is the primary function of a switch?
Connect computers in a linear bus
Regenerate signals in a network
Control and manage network traffic
Connect LANs working on different protocols
Which of the following is an advantage of a ring topology?
Data is quickly transferred without a bottleneck
More expensive than linear bus topologies
Requires less cable length than a star topology
Easy to add or remove devices without affecting the network
Which layer of the OSI model is responsible for data compression and encryption?
Physical layer
Data Link layer
Transport layer
Presentation layer
What is the primary function of a firewall in networking?
Connect different networks
Control and manage network traffic
Regenerate signals in a network
Filter and block unauthorized access
In wireless communication, what is the purpose of modulation?
Convert digital signals to analog signals
Filter out noise from the signal
Transmit data over long distances
Regenerate signals in a network
What is the function of a router in networking?
Connect different networks
Repeat signals in a network
Manage network security
Connect computers in a linear bus
In networking, what does the acronym LAN stand for?
Local Area Network
Large Area Network
Longitudinal Area Network
Low-latency Area Network
Which layer of the OSI model is responsible for routing and forwarding data between different networks?
Network layer
Transport layer
Data Link layer
Physical layer
What is the purpose of a MAC address in networking?
Identify a device on a network
Assign IP addresses to devices on the network
Convert domain names to IP addresses
Encrypt data during transmission
What is a characteristic of Simplex connections in communication?
Two-way communication
One-way communication
Simultaneous transmission and reception
Both a and c
In the context of duplex connections, what does "half duplex" mean?
Users can transmit and receive at the same time on the same line.
Users can transmit and receive, but not at the same time, using the same line.
Users can transmit and receive using separate communication channels.
Users can communicate only through fixed telephones.
How is Full Duplex different from Half Duplex in terms of communication channels
Full Duplex uses one channel, while Half Duplex uses two channels.
Full Duplex uses two channels, while Half Duplex uses one channel.
Both use the same channel.
Full Duplex doesn't involve simultaneous transmission and reception.
Which duplex technique separates uplink and downlink channels using frequency?
Time Division Duplex (TDD)
Frequency Division Duplex (FDD)
Simplex connection
Half Duplex
What is the purpose of Frequency Division Multiplexing (FDM) in communication?
Separate between uplink and downlink channels
Separate between users using time slots
Separate between users by using one frequency for each user all the time
Provide full-duplex communication
How does Time Division Multiplexing (TDM) separate between users?
By using one frequency for each user
By using one frequency and time slot duration for each user
By separating uplink and downlink channels
By assigning dedicated frequencies for each user
Which access technique involves each user taking a time slot in a frequency for the entire call duration?
Code Division Multiple Access (CDMA)
Time Division Multiple Access (TDMA)
Frequency Division Multiple Access (FDMA)
Simplex Access
What is measured in Hertz (Hz)?
Luminous flux
Frequency
Force
Electric charge
In which unit is electrical potential difference measured?
Watt (W)
Volt (V)
Pascal (Pa)
Ohm (Ω)
Which unit is used to measure the amount of ionising radiation absorbed by a material?
Sievert (Sv)
Tesla (T)
Gray (Gy)
Coulomb (C)
What does the unit Becquerel (Bq) measure?
Catalytic activity
Luminous flux
Radioactivity (decays per unit time)
Temperature relative to 273.15 K
