Q. What is the main advantage of using a thyristor over a standard diode?
A.
Higher current rating
B.
Ability to control power
C.
Lower forward voltage drop
D.
Faster switching speed
Show solution
Solution
Thyristors can control power and are used in applications requiring switching.
Correct Answer:
B
— Ability to control power
Learn More →
Q. What is the main advantage of using AC over DC for power transmission?
A.
AC is easier to generate
B.
AC can be easily transformed to higher voltages
C.
AC is safer
D.
AC is more efficient in small circuits
Show solution
Solution
AC can be easily transformed to higher voltages, making it more efficient for long-distance power transmission.
Correct Answer:
B
— AC can be easily transformed to higher voltages
Learn More →
Q. What is the main advantage of using Alternating Current (AC) for power distribution?
A.
Easier to convert to DC
B.
Can be transmitted over long distances with less loss
C.
More efficient in small devices
D.
Safer for household use
Show solution
Solution
The main advantage of using Alternating Current (AC) for power distribution is that it can be transmitted over long distances with less loss.
Correct Answer:
B
— Can be transmitted over long distances with less loss
Learn More →
Q. What is the main advantage of using Alternating Current (AC) for power transmission?
A.
Easier to convert to different voltages
B.
More efficient at low voltages
C.
Safer for household use
D.
Requires less insulation
Show solution
Solution
The main advantage of using Alternating Current (AC) for power transmission is that it is easier to convert to different voltages.
Correct Answer:
A
— Easier to convert to different voltages
Learn More →
Q. What is the main advantage of using an instrumentation amplifier?
A.
High input impedance and low output impedance
B.
Ability to amplify small differential signals in the presence of noise
C.
Simple design and low cost
D.
Wide bandwidth
Show solution
Solution
An instrumentation amplifier is designed to amplify small differential signals while rejecting common-mode noise, making it ideal for sensor applications.
Correct Answer:
B
— Ability to amplify small differential signals in the presence of noise
Learn More →
Q. What is the main advantage of using an integrator circuit with an op-amp?
A.
It provides a constant output voltage
B.
It can convert a square wave to a triangular wave
C.
It amplifies high-frequency signals
D.
It filters out low-frequency noise
Show solution
Solution
An integrator circuit converts a square wave input into a triangular wave output by integrating the input signal over time.
Correct Answer:
B
— It can convert a square wave to a triangular wave
Learn More →
Q. What is the main advantage of using BJTs over FETs?
A.
Higher input impedance
B.
Higher current gain
C.
Lower power consumption
D.
Better thermal stability
Show solution
Solution
BJTs typically offer higher current gain compared to FETs, making them suitable for certain amplification applications.
Correct Answer:
B
— Higher current gain
Learn More →
Q. What is the main advantage of using FETs in semiconductor memory?
A.
Higher power consumption
B.
Lower input impedance
C.
Higher input impedance
D.
More complex fabrication
Show solution
Solution
FETs have a higher input impedance, which makes them suitable for low-power applications in semiconductor memory.
Correct Answer:
C
— Higher input impedance
Learn More →
Q. What is the main advantage of using PLDs over fixed logic devices?
A.
Lower cost
B.
Higher speed
C.
Flexibility in design
D.
Simplicity of use
Show solution
Solution
PLDs offer flexibility in design, allowing users to modify the logic functions as needed.
Correct Answer:
C
— Flexibility in design
Learn More →
Q. What is the main characteristic of a depletion-mode FET?
A.
It is normally on
B.
It is normally off
C.
It has a negative resistance
D.
It requires a positive gate voltage to conduct
Show solution
Solution
Depletion-mode FETs are normally on, meaning they conduct current without any gate voltage applied.
Correct Answer:
A
— It is normally on
Learn More →
Q. What is the main characteristic of a FET?
A.
Current-controlled device
B.
Voltage-controlled device
C.
Power-controlled device
D.
Temperature-controlled device
Show solution
Solution
FETs (Field Effect Transistors) are voltage-controlled devices, where the output current is controlled by the voltage applied to the gate terminal.
Correct Answer:
B
— Voltage-controlled device
Learn More →
Q. What is the main characteristic of a P-N junction in semiconductor physics?
A.
It allows current to flow in both directions
B.
It creates a depletion region
C.
It acts as a capacitor
D.
It has infinite resistance
Show solution
Solution
A P-N junction creates a depletion region where charge carriers are absent, which is crucial for its rectifying behavior.
Correct Answer:
B
— It creates a depletion region
Learn More →
Q. What is the main characteristic of a Zener diode?
A.
It can amplify signals
B.
It allows current to flow in both directions
C.
It maintains a constant voltage across it
D.
It is used for switching applications
Show solution
Solution
Zener diodes are designed to maintain a constant voltage across them when reverse-biased, making them useful for voltage regulation.
Correct Answer:
C
— It maintains a constant voltage across it
Learn More →
Q. What is the main difference between NPN and PNP transistors?
A.
NPN transistors have a positive collector
B.
PNP transistors have a negative emitter
C.
NPN transistors use electrons as charge carriers
D.
PNP transistors are always off
Show solution
Solution
NPN transistors use electrons as charge carriers, while PNP transistors use holes.
Correct Answer:
C
— NPN transistors use electrons as charge carriers
Learn More →
Q. What is the main disadvantage of using a transformer?
A.
High cost
B.
Size and weight
C.
Limited frequency response
D.
Low efficiency
Show solution
Solution
One of the main disadvantages of using a transformer is its size and weight, especially for high power applications.
Correct Answer:
B
— Size and weight
Learn More →
Q. What is the main function of a zener diode?
A.
To rectify AC signals
B.
To allow current in one direction only
C.
To provide voltage regulation
D.
To amplify signals
Show solution
Solution
A zener diode is 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
Learn More →
Q. What is the main purpose 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
Show solution
Solution
A digital-to-analog converter (DAC) is used to convert digital signals into analog signals.
Correct Answer:
C
— To convert digital signals to analog
Learn More →
Q. What is the main purpose of an operational amplifier (op-amp) in AC circuits?
A.
To convert AC to DC
B.
To amplify AC signals
C.
To rectify AC signals
D.
To filter AC signals
Show solution
Solution
Operational amplifiers are used to amplify AC signals, making them suitable for various applications in analog electronics.
Correct Answer:
B
— To amplify AC signals
Learn More →
Q. What is the main purpose of an operational amplifier?
A.
To amplify current
B.
To amplify voltage
C.
To convert AC to DC
D.
To switch signals
Show solution
Solution
Operational amplifiers are primarily used to amplify voltage signals.
Correct Answer:
B
— To amplify voltage
Learn More →
Q. What is the output impedance of an ideal op-amp?
A.
Zero ohms
B.
Infinite ohms
C.
100 ohms
D.
1k ohms
Show solution
Solution
An ideal operational amplifier has infinite output impedance, allowing it to drive loads without affecting the output voltage.
Correct Answer:
B
— Infinite ohms
Learn More →
Q. What is the output of a binary AND operation for inputs 1 and 0?
Show solution
Solution
The output of a binary AND operation is 0 when one of the inputs is 0.
Correct Answer:
B
— 0
Learn More →
Q. What is the output of a full-wave rectifier when given an AC input?
A.
A pure AC signal
B.
A pulsating DC signal
C.
A constant DC voltage
D.
An amplified AC signal
Show solution
Solution
A full-wave rectifier converts an AC input into a pulsating DC signal by rectifying both halves of the AC waveform.
Correct Answer:
B
— A pulsating DC signal
Learn More →
Q. What is the output of a half-wave rectifier when the input is a sine wave?
A.
A sine wave
B.
A square wave
C.
A pulsating DC signal
D.
A constant DC signal
Show solution
Solution
The output of a half-wave rectifier when the input is a sine wave is a pulsating DC signal, as it only allows one half of the AC waveform to pass through.
Correct Answer:
C
— A pulsating DC signal
Learn More →
Q. What is the output of an inverting op-amp if the input voltage is 1V and the feedback resistor is twice the input resistor?
A.
0.5V
B.
1V
C.
2V
D.
-2V
Show solution
Solution
In an inverting op-amp configuration, if Rf is twice Rin, the output will be -2V for an input of 1V.
Correct Answer:
D
— -2V
Learn More →
Q. What is the output state of a D flip-flop when the clock signal transitions from low to high?
A.
It holds the previous state
B.
It resets to zero
C.
It takes the value of the D input
D.
It toggles its state
Show solution
Solution
A D flip-flop captures the value of the D input on the rising edge of the clock signal and holds that value until the next clock transition.
Correct Answer:
C
— It takes the value of the D input
Learn More →
Q. What is the output state of a JK flip-flop when both J and K inputs are high?
A.
Set state
B.
Reset state
C.
Toggle state
D.
No change
Show solution
Solution
When both J and K inputs are high, the JK flip-flop toggles its output state.
Correct Answer:
C
— Toggle state
Learn More →
Q. What is the output voltage of a non-inverting op-amp with a gain of 10 and an input voltage of 1V?
A.
1V
B.
5V
C.
10V
D.
0.1V
Show solution
Solution
The output voltage of a non-inverting op-amp with a gain of 10 and an input voltage of 1V is 10V.
Correct Answer:
C
— 10V
Learn More →
Q. What is the output voltage of an ideal op-amp when the input voltage is zero?
A.
Zero volts
B.
Equal to the supply voltage
C.
Equal to the input voltage
D.
Infinite volts
Show solution
Solution
An ideal op-amp will output zero volts when the input voltage is zero, consistent with Ohm's Law.
Correct Answer:
A
— Zero volts
Learn More →
Q. What is the output voltage of an operational amplifier when the input voltage is zero and the op-amp is powered?
A.
0V
B.
Positive saturation voltage
C.
Negative saturation voltage
D.
Depends on the circuit configuration
Show solution
Solution
The output voltage of an operational amplifier with zero input voltage depends on the circuit configuration and can be in saturation.
Correct Answer:
D
— Depends on the circuit configuration
Learn More →
Q. What is the primary advantage of using parallel circuits in electronic devices?
A.
Increased voltage
B.
Increased current capacity
C.
Redundancy and reliability
D.
Simplicity in design
Show solution
Solution
The primary advantage of using parallel circuits is redundancy and reliability; if one component fails, the others can still function.
Correct Answer:
C
— Redundancy and reliability
Learn More →
Showing 181 to 210 of 432 (15 Pages)