Introduction to Electronics & Communication Engineering (Set-6)
What is the primary purpose of circuit analysis in electronics?
A Understanding circuit behavior
B Data transmission
C Signal modulation
D Power distribution
Circuit analysis is used to understand and predict the behavior of electronic circuits. It involves calculating voltages, currents, and power distribution to ensure proper functionality and design of the circuit.
What is the function of a microprocessor in an electronic system?
A Amplify signals
B Store energy
C Process data
D Convert signals
A microprocessor acts as the central processing unit (CPU) of an electronic system. It performs calculations, controls tasks, and processes data to enable system operation, from simple devices to complex computers.
Which of the following is a key feature of digital communication protocols?
A Analog signal processing
B Discrete signal encoding
C High noise sensitivity
D Continuous signal transmission
Digital communication protocols use discrete signals (usually binary 0s and 1s) to encode information. This makes digital communication more resistant to noise and distortion compared to analog transmission.
Which component is used to control the flow of electric current in a circuit?
A Diode
B Resistor
C Capacitor
D Switch
A switch is used to open or close a circuit, thus controlling the flow of electric current. It is a basic component in electrical and electronic circuits to turn devices on or off.
What does the term ‘voltage drop’ refer to in a circuit?
A Change in power
B Decrease in voltage across a component
C Increase in current
D Increase in voltage across a component
Voltage drop refers to the reduction in voltage as electrical current passes through a component in a circuit. This phenomenon occurs due to resistance, and it’s crucial for energy conservation in circuits.
Which of the following is the primary function of a clock in a microprocessor?
A Regulate voltage
B Amplify signals
C Provide timing signals
D Store data
A clock in a microprocessor provides timing signals that synchronize the operations of different components. It determines the rate at which instructions are executed and ensures coordination between various processes.
Which of the following is typically used for signal amplification?
A Amplifier
B Oscillator
C Resistor
D Transformer
An amplifier increases the power of a signal, making it stronger and suitable for further processing or transmission. It is commonly used in audio systems, radio communication, and electronic devices.
What does a communication protocol define?
A Voltage levels
B Signal modulation
C Signal frequency
D Rules for data exchange
A communication protocol defines the set of rules that dictate how data is transmitted, received, and processed between devices. It ensures proper communication and interoperability in networks and systems.
What is the function of a voltage regulator in electronic circuits?
A Decrease voltage
B Maintain constant voltage
C Increase voltage
D Store voltage
A voltage regulator ensures that a stable and constant voltage is supplied to components, even if the input voltage fluctuates. It is crucial for protecting sensitive devices from voltage spikes or drops.
Which of the following is an essential part of digital signal processing?
A Modulation
B Rectification
C Filtering
D Amplification
Filtering is a key component of digital signal processing. It removes unwanted frequencies or noise from a signal, allowing only the desired frequencies to pass, improving signal quality and clarity.
What is the primary function of a microcontroller in embedded systems?
A Control external devices
B Store memory
C Generate signals
D Process large datasets
A microcontroller is a small, self-contained unit used in embedded systems to control various external devices, such as sensors, motors, and displays. It is programmed to execute specific tasks within a system.
Which of the following is used to convert analog signals to digital form?
A Amplifier
B DAC (Digital to Analog Converter)
C ADC (Analog to Digital Converter)
D Modulator
An ADC converts continuous analog signals into discrete digital values. This conversion is necessary for processing and analyzing real world signals in digital systems like microcontrollers and computers.
What does the term ‘impedance’ refer to in a circuit?
A Voltage regulation
B Signal amplification
C Resistance to DC
D Total opposition to AC current
Impedance is the total opposition that a circuit presents to alternating current (AC). It combines resistance and reactance and determines how much current will flow when a voltage is applied to the circuit.
What is the function of a rectifier in electronic circuits?
A Convert AC to DC
B Filter signals
C Store energy
D Convert DC to AC
A rectifier converts alternating current (AC) to direct current (DC). This is essential for powering electronic devices that require DC, such as computers, LED lights, and many other consumer electronics.
What is the purpose of a circuit board in electronic devices?
A Control voltage
B Store data
C Connect components
D Provide power
A circuit board, often a printed circuit board (PCB), physically supports and electrically connects various electronic components. It provides the pathways for signals and power to flow between components in electronic devices.