Q. What is the primary difference between Alternating Current (AC) and Direct Current (DC)?
A.
AC flows in one direction only
B.
DC flows in one direction only
C.
AC is used in batteries
D.
DC is used in power plants
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Solution
Direct Current (DC) flows in one direction only, while Alternating Current (AC) changes direction periodically.
Correct Answer:
B
— DC flows in one direction only
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Q. What is the primary difference between electrolytic and ceramic capacitors?
A.
Size and voltage rating
B.
Polarity and capacitance value
C.
Temperature coefficient and frequency response
D.
Cost and availability
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Solution
Electrolytic capacitors are polarized and typically have higher capacitance values, while ceramic capacitors are non-polarized.
Correct Answer:
B
— Polarity and capacitance value
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Q. What is the primary disadvantage of bipolar junction transistors (BJTs) compared to MOSFETs in integrated circuits?
A.
Higher power consumption
B.
Lower switching speed
C.
More complex fabrication
D.
Larger size
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Solution
BJTs generally consume more power than MOSFETs, making them less favorable for low-power applications in integrated circuits.
Correct Answer:
A
— Higher power consumption
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Q. What is the primary function of a 555 timer in monostable mode?
A.
Generate a continuous square wave
B.
Generate a single pulse of a specific duration
C.
Act as a voltage comparator
D.
Control the brightness of an LED
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Solution
In monostable mode, the 555 timer generates a single pulse of a specific duration when triggered.
Correct Answer:
B
— Generate a single pulse of a specific duration
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Q. What is the primary function of a binary to decimal converter?
A.
To convert decimal numbers to binary
B.
To convert binary numbers to decimal
C.
To convert hexadecimal numbers to binary
D.
To convert binary numbers to octal
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Solution
A binary to decimal converter takes a binary number and converts it into its decimal equivalent.
Correct Answer:
B
— To convert binary numbers to decimal
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Q. What is the primary function of a Bipolar Junction Transistor (BJT)?
A.
Voltage regulation
B.
Current amplification
C.
Signal modulation
D.
Power conversion
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Solution
A BJT is primarily used for current amplification in electronic circuits.
Correct Answer:
B
— Current amplification
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Q. What is the primary function of a bistable multivibrator?
A.
To generate a continuous waveform
B.
To store a binary state
C.
To convert analog signals to digital
D.
To amplify signals
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Solution
A bistable multivibrator has two stable states and can store a binary state (0 or 1) until it is triggered to change states.
Correct Answer:
B
— To store a binary state
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Q. What is the primary function of a buffer in digital circuits?
A.
To increase signal strength
B.
To decrease signal strength
C.
To perform logic operations
D.
To store data
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Solution
A buffer is used to increase the strength of a signal, allowing it to drive larger loads.
Correct Answer:
A
— To increase signal strength
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Q. What is the primary function of a bypass capacitor in a BJT amplifier?
A.
To increase the input impedance
B.
To reduce noise
C.
To stabilize the bias point
D.
To improve frequency response
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Solution
A bypass capacitor improves the frequency response of a BJT amplifier by allowing AC signals to bypass the emitter resistor.
Correct Answer:
D
— To improve frequency response
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Q. What is the primary function of a capacitor in a rectifier circuit?
A.
To increase current
B.
To filter out noise
C.
To store charge
D.
To convert AC to DC
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Solution
In a rectifier circuit, a capacitor is used to store charge and smooth out the output voltage.
Correct Answer:
C
— To store charge
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Q. What is the primary function of a capacitor in an electronic circuit?
A.
To store electrical energy
B.
To amplify signals
C.
To rectify AC to DC
D.
To provide feedback
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Solution
Capacitors store electrical energy in an electric field, which can be released when needed.
Correct Answer:
A
— To store electrical energy
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Q. What is the primary function of a counter in digital electronics?
A.
To store data
B.
To count events
C.
To perform arithmetic operations
D.
To convert signals
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Solution
A counter is primarily used to count the number of occurrences of an event.
Correct Answer:
B
— To count events
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Q. What is the primary function of a DBMS architecture?
A.
To manage data storage and retrieval
B.
To create user interfaces
C.
To perform data analysis
D.
To design database schemas
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Solution
The primary function of a DBMS architecture is to manage data storage and retrieval efficiently.
Correct Answer:
A
— To manage data storage and retrieval
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Q. What is the primary function of a decoder in combinational logic?
A.
To perform arithmetic operations
B.
To convert binary data to decimal
C.
To select one output from multiple inputs
D.
To convert binary inputs to a unique output line
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Solution
A decoder converts binary inputs into a unique output line, activating one output for each input combination.
Correct Answer:
D
— To convert binary inputs to a unique output line
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Q. What is the primary function of a decoder in digital circuits?
A.
To convert binary data to decimal
B.
To select one output line based on the binary input
C.
To perform arithmetic operations
D.
To store data
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Solution
A decoder converts binary input into a unique output line, effectively selecting one of many outputs.
Correct Answer:
B
— To select one output line based on the binary input
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Q. What is the primary function of a decoder in MSI logic circuits?
A.
To perform arithmetic operations
B.
To convert binary data to decimal
C.
To select one of many inputs
D.
To convert binary inputs to a specific output
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Solution
A decoder converts binary inputs into a specific output, activating one output line for each unique input combination.
Correct Answer:
D
— To convert binary inputs to a specific output
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Q. What is the primary function of a digital-to-analog converter (DAC)?
A.
To sample an analog signal
B.
To convert digital signals into analog signals
C.
To filter digital signals
D.
To amplify analog signals
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Solution
A DAC converts digital signals back into analog signals, allowing digital data to be represented in a form that can be used by analog devices.
Correct Answer:
B
— To convert digital signals into analog signals
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Q. What is the primary function of a diode in a rectifier circuit?
A.
To amplify the signal
B.
To allow current to flow in one direction
C.
To store electrical energy
D.
To convert AC to DC
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Solution
A diode allows current to flow in one direction, which is essential for converting alternating current (AC) to direct current (DC) in rectifier circuits.
Correct Answer:
B
— To allow current to flow in one direction
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Q. What is the primary function of a diode in a semiconductor memory circuit?
A.
To amplify signals
B.
To allow current to flow in one direction
C.
To store charge
D.
To switch signals
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Solution
Diodes are used in semiconductor memory circuits to allow current to flow in one direction, preventing reverse current that could damage the circuit.
Correct Answer:
B
— To allow current to flow in one direction
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Q. What is the primary function of a diode in a series circuit?
A.
To amplify current
B.
To allow current to flow in one direction
C.
To store electrical energy
D.
To increase voltage
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Solution
A diode allows current to flow in one direction, making it essential for controlling current in series circuits.
Correct Answer:
B
— To allow current to flow in one direction
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Q. What is the primary function of a diode in a series-parallel circuit?
A.
To amplify signals
B.
To allow current to flow in one direction
C.
To store electrical energy
D.
To resist current flow
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Solution
Diodes are used to allow current to flow in one direction, making them essential in rectifying circuits.
Correct Answer:
B
— To allow current to flow in one direction
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Q. What is the primary function of a diode in an AC circuit?
A.
To amplify the signal
B.
To rectify the current
C.
To filter noise
D.
To provide feedback
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Solution
Diodes are used to rectify alternating current (AC) into direct current (DC) by allowing current to flow in one direction only.
Correct Answer:
B
— To rectify the current
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Q. What is the primary function of a FET?
A.
Current amplification
B.
Voltage amplification
C.
Voltage control
D.
Power control
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Solution
A FET primarily functions as a voltage-controlled device, where the output current is controlled by the input voltage.
Correct Answer:
C
— Voltage control
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Q. What is the primary function of a Field Effect Transistor (FET)?
A.
To amplify current
B.
To control voltage
C.
To switch electronic signals
D.
To rectify AC to DC
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Solution
FETs are primarily used to switch electronic signals due to their high input impedance and low power consumption.
Correct Answer:
C
— To switch electronic signals
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Q. What is the primary function of a flip-flop in digital circuits?
A.
To amplify signals
B.
To store binary data
C.
To perform arithmetic operations
D.
To convert analog signals to digital
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Solution
A flip-flop is a bistable device that can store one bit of binary data, making it essential for memory storage in digital circuits.
Correct Answer:
B
— To store binary data
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Q. What is the primary function of a flip-flop in digital design?
A.
To perform arithmetic operations
B.
To store binary data
C.
To generate clock signals
D.
To convert analog signals to digital
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Solution
A flip-flop is a basic memory element in digital circuits that can store one bit of binary data.
Correct Answer:
B
— To store binary data
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Q. What is the primary function of a flip-flop in digital electronics?
A.
Data storage
B.
Data transmission
C.
Data conversion
D.
Data processing
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Solution
The primary function of a flip-flop is data storage.
Correct Answer:
A
— Data storage
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Q. What is the primary function of a microprocessor?
A.
To store data permanently
B.
To perform arithmetic and logic operations
C.
To manage input and output devices
D.
To provide power to the system
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Solution
The primary function of a microprocessor is to perform arithmetic and logic operations, which are essential for executing instructions.
Correct Answer:
B
— To perform arithmetic and logic operations
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Q. What is the primary function of a MOSFET?
A.
To amplify signals
B.
To switch electronic signals
C.
To rectify AC signals
D.
To store energy
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Solution
MOSFETs are primarily used as electronic switches in various applications due to their high efficiency.
Correct Answer:
B
— To switch electronic signals
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Q. What is the primary function of a multiplexer?
A.
To perform arithmetic operations
B.
To select one of many inputs
C.
To store data
D.
To amplify signals
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Solution
A multiplexer selects one of many input signals and forwards the selected input to a single output line.
Correct Answer:
B
— To select one of many inputs
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