Q. What is the primary reason inductors are used in power supply circuits?
A.
To filter out high frequencies
B.
To store energy
C.
To regulate voltage
D.
To convert AC to DC
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Solution
Inductors are used in power supply circuits primarily to store energy.
Correct Answer:
B
— To store energy
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Q. What is the primary role of a bypass capacitor in a BJT amplifier circuit?
A.
To increase gain
B.
To stabilize the bias point
C.
To filter out noise
D.
To provide AC ground
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Solution
A bypass capacitor provides an AC ground, allowing AC signals to pass while blocking DC.
Correct Answer:
D
— To provide AC ground
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Q. What is the primary role of a capacitor in a rectifier circuit?
A.
To increase the voltage
B.
To filter out AC ripple
C.
To amplify the signal
D.
To switch the circuit on and off
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Solution
In a rectifier circuit, a capacitor is used to filter out AC ripple, smoothing the output DC voltage.
Correct Answer:
B
— To filter out AC ripple
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Q. What is the primary role of a capacitor in an RC circuit?
A.
To resist current flow
B.
To store and release energy
C.
To amplify signals
D.
To convert AC to DC
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Solution
The primary role of a capacitor in an RC circuit is to store and release electrical energy.
Correct Answer:
B
— To store and release energy
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Q. What is the primary role of a digital-to-analog converter (DAC)?
A.
To convert analog signals to digital
B.
To amplify analog signals
C.
To convert digital signals to analog
D.
To filter digital signals
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Solution
A digital-to-analog converter (DAC) converts digital signals into corresponding analog signals for various applications.
Correct Answer:
C
— To convert digital signals to analog
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Q. What is the primary role of a diode in a rectifier circuit?
A.
To amplify current
B.
To allow current to flow in one direction
C.
To store energy
D.
To convert AC to DC
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Solution
The primary role of a diode in a rectifier circuit is to allow current to flow in one direction.
Correct Answer:
B
— To allow current to flow in one direction
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Q. What is the primary role of a rectifier in a power supply?
A.
To increase voltage
B.
To convert AC to DC
C.
To filter noise
D.
To regulate current
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Solution
The primary role of a rectifier is to convert alternating current (AC) to direct current (DC).
Correct Answer:
B
— To convert AC to DC
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Q. What is the primary role of a rectifier in an AC circuit?
A.
To amplify the AC signal
B.
To convert AC to DC
C.
To filter the AC signal
D.
To generate AC from DC
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Solution
The primary role of a rectifier is to convert alternating current (AC) to direct current (DC).
Correct Answer:
B
— To convert AC to DC
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Q. What is the primary role of a rectifier in power supply circuits?
A.
To increase voltage
B.
To convert AC to DC
C.
To filter noise
D.
To regulate current
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Solution
The primary role of a rectifier is to convert alternating current (AC) into direct current (DC) for use in power supply circuits.
Correct Answer:
B
— To convert AC to DC
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Q. What is the primary role of a resistor in a BJT circuit?
A.
To increase current gain
B.
To limit base current
C.
To provide feedback
D.
To stabilize temperature
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Solution
A resistor in a BJT circuit is primarily used to limit the base current to prevent damage to the transistor.
Correct Answer:
B
— To limit base current
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Q. What is the primary role of a resistor in a circuit?
A.
To store energy
B.
To limit current
C.
To amplify signals
D.
To rectify voltage
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Solution
A resistor is used to limit the flow of current in a circuit.
Correct Answer:
B
— To limit current
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Q. What is the primary role of a switch in a WAN?
A.
To connect multiple networks
B.
To filter and forward data packets within a network
C.
To provide internet access
D.
To manage IP addresses
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Solution
In a WAN, switches connect multiple networks and facilitate communication between them, although they primarily operate at the Data Link Layer.
Correct Answer:
B
— To filter and forward data packets within a network
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Q. What is the primary role of a voltage divider in a circuit?
A.
To increase voltage
B.
To decrease voltage
C.
To isolate components
D.
To filter signals
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Solution
A voltage divider is used to decrease voltage to a desired level by using two resistors.
Correct Answer:
B
— To decrease voltage
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Q. What is the primary role of a Zener diode in a circuit?
A.
To rectify AC signals
B.
To amplify signals
C.
To provide voltage regulation
D.
To switch currents
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Solution
A Zener diode is used primarily for voltage regulation, as it allows current to flow in the reverse direction when a specific reverse voltage is reached.
Correct Answer:
C
— To provide voltage regulation
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Q. What is the primary role of a Zener diode?
A.
To amplify signals
B.
To rectify AC signals
C.
To provide voltage regulation
D.
To switch circuits
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Solution
Zener diodes are designed to allow current to flow in the reverse direction when a specific reverse voltage is reached, providing voltage regulation.
Correct Answer:
C
— To provide voltage regulation
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Q. What is the primary role of an inductor in an RL circuit?
A.
To resist changes in current
B.
To store electrical energy in a magnetic field
C.
To convert AC to DC
D.
To amplify voltage
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Solution
An inductor in an RL circuit resists changes in current, storing energy in a magnetic field when current flows through it.
Correct Answer:
B
— To store electrical energy in a magnetic field
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Q. What is the primary role of an operational amplifier in a circuit?
A.
To act as a switch
B.
To amplify voltage signals
C.
To convert AC to DC
D.
To store energy
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Solution
Operational amplifiers are designed to amplify voltage signals in various applications.
Correct Answer:
B
— To amplify voltage signals
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Q. What is the primary role of the gate terminal in a MOSFET?
A.
To provide power
B.
To control the channel conductivity
C.
To dissipate heat
D.
To connect to the load
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Solution
The gate terminal in a MOSFET controls the channel conductivity by creating an electric field that modulates the channel.
Correct Answer:
B
— To control the channel conductivity
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Q. What is the primary role of the Network Layer in the OSI model regarding security?
A.
To provide end-to-end communication
B.
To route packets between devices
C.
To encrypt data
D.
To manage sessions
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Solution
The Network Layer is responsible for routing packets between devices, which is crucial for maintaining secure communication paths.
Correct Answer:
B
— To route packets between devices
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Q. What is the primary use of a choke inductor?
A.
To filter out high-frequency signals
B.
To amplify signals
C.
To rectify AC voltage
D.
To store energy
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Solution
Choke inductors are primarily used to filter out high-frequency signals in power supplies.
Correct Answer:
A
— To filter out high-frequency signals
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Q. What is the primary use of a CPLD in digital circuits?
A.
To amplify signals
B.
To perform simple logic functions
C.
To implement complex algorithms
D.
To store large amounts of data
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Solution
CPLDs are primarily used to perform simple logic functions in digital circuits.
Correct Answer:
B
— To perform simple logic functions
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Q. What is the primary use of a diode in a PLD?
A.
To amplify signals
B.
To provide logic functions
C.
To isolate different sections
D.
To rectify power supply
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Solution
Diodes in PLDs are used to provide logic functions by controlling the flow of signals.
Correct Answer:
B
— To provide logic functions
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Q. What is the primary use of a FET in analog circuits?
A.
Switching
B.
Signal amplification
C.
Rectification
D.
Voltage regulation
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Solution
FETs are primarily used for signal amplification in analog circuits due to their high input impedance.
Correct Answer:
B
— Signal amplification
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Q. What is the primary use of a phototransducer?
A.
To convert light into electrical signals
B.
To convert sound into electrical signals
C.
To convert heat into electrical signals
D.
To convert mechanical motion into electrical signals
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Solution
Phototransducers are used to convert light into electrical signals.
Correct Answer:
A
— To convert light into electrical signals
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Q. What is the primary use of a PLD in digital circuits?
A.
To store data
B.
To perform arithmetic operations
C.
To implement combinational and sequential logic
D.
To generate clock signals
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Solution
The primary use of a PLD in digital circuits is to implement combinational and sequential logic, allowing for custom logic designs.
Correct Answer:
C
— To implement combinational and sequential logic
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Q. What is the primary use of a ring counter?
A.
To count pulses
B.
To generate specific sequences
C.
To store data
D.
To perform calculations
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Solution
A ring counter is primarily used to generate specific sequences of outputs.
Correct Answer:
B
— To generate specific sequences
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Q. What is the primary use of a Schmitt trigger?
A.
To amplify signals
B.
To convert analog signals to digital
C.
To provide hysteresis in signal processing
D.
To rectify AC signals
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Solution
A Schmitt trigger is used to provide hysteresis in signal processing, ensuring clean transitions between high and low states.
Correct Answer:
C
— To provide hysteresis in signal processing
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Q. What is the primary use of a shift register in digital design?
A.
To perform arithmetic operations
B.
To store and shift data
C.
To generate clock signals
D.
To amplify signals
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Solution
A shift register is used to store data and shift it in or out serially, one bit at a time.
Correct Answer:
B
— To store and shift data
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Q. What is the primary use of a timer in electronic circuits?
A.
To amplify signals
B.
To measure resistance
C.
To generate time delays
D.
To rectify AC signals
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Solution
Timers are used in circuits to generate precise time delays or to create timing sequences.
Correct Answer:
C
— To generate time delays
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Q. What is the primary use of a Zener diode in AC circuits?
A.
Rectification
B.
Voltage regulation
C.
Signal amplification
D.
Current limiting
Show solution
Solution
Zener diodes are primarily used for voltage regulation in AC circuits, maintaining a constant output voltage despite variations in input voltage.
Correct Answer:
B
— Voltage regulation
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