WorksheetsM4- Electronics Fundamentals
Total questions: 50
Worksheet time: 25mins
What are the most important elements used for semiconductors?
Copper and Aluminum
Silicon and Germanium
Iron and Nickel
Gold and Silver
What is the purpose of a semiconductor diode?
To amplify electrical signals
To allow current to flow in only one direction
To store electrical energy
To convert AC to DC
What is the threshold voltage for a silicon diode?
0.3 volts
0.7 volts
1.2 volts
2.0 volts
What happens to the resistance of a silicon diode in the forward-biased condition above the threshold voltage?
It becomes very high
It becomes very low
It remains unchanged
It fluctuates
Which type of diode is primarily used in communication technology?
Rectifier diodes
High power diodes
Microdiodes
Zener diodes
What should a serviceable diode show on a multimeter when tested in the forward bias direction?
High resistance
Low resistance
Around 0.7 volts
Zero volts
Why might diodes be connected in series?
To increase the forward current
To increase the reverse voltage capacity
To decrease the forward voltage
To decrease the reverse current
What is the purpose of a free-wheeling diode?
To amplify signals
To short-circuit back-emf
To store energy
To convert DC to AC
What is the main application of diodes in rectifiers?
To amplify signals
To transform AC to DC
To store energy
To regulate voltage
How many diodes are required for a full-wave rectifier using a bridge circuit?
Two
Four
Six
Eight
In a brushless generator, what component rectifies the current?
Transformer
Capacitor
Rotating diodes
Inductor
What is the primary use of Z-diodes?
To amplify signals
To regulate voltage
To store energy
To convert AC to DC
What determines the color of light emitted by an LED?
The current passing through it
The semiconductor material used
The voltage applied
The size of the diode
How are photodiodes connected in a circuit?
In forward direction
In reverse direction
In parallel
In series
What happens to the resistance of an LDR when light is directed onto it?
It increases
It decreases
It remains constant
It fluctuates
What is the main task of an optical coupling device?
To amplify signals
To separate electrical potentials
To store energy
To convert AC to DC
What is a varistor primarily used for?
To amplify signals
To protect against excess voltage
To store energy
To convert AC to DC
What is the function of a thyristor?
To amplify signals
To act as a fast electronic switch
To store energy
To convert AC to DC
What is the purpose of phase angle control in a thyristor circuit?
To increase voltage
To decrease current
To regulate power output
To store energy
What does TRIAC stand for?
Triode alternating current switch
Triode alternating current converter
Triode alternating current amplifier
Triode alternating current rectifier
What are the three terminals of a transistor called?
Anode, Cathode, Gate
Source, Drain, Gate
Emitter, Base, Collector
Positive, Negative, Ground
What is the ratio of the collector current to the base current called?
Voltage gain
Current gain
Power gain
Resistance gain
In a transistor switching stage, what does a high resistance state indicate?
Switch open
Switch closed
High current flow
Low voltage
What is a major advantage of integrated circuits?
Large size
High density of components
High cost
Easy to repair
What type of amplifier is an operational amplifier always?
Single-ended amplifier
Differential amplifier
Power amplifier
Voltage amplifier
Which of the following is a standard configuration of an operational amplifier?
Inverting amplifier
Non-inverting amplifier
Adding amplifier
All of the above
What does a P-regulator do?
It integrates the input voltage
It differentiates the input voltage
It maintains a fixed ratio between input and output voltage
It amplifies the input voltage
What is a common material used for printed circuit boards?
Copper laminated paper
Aluminum foil
Steel plates
Plastic sheets
How do photodiodes behave when the P-N junction is illuminated?
They block the current
They become conductive
They store energy
They amplify signals
What is the main material used for manufacturing LDRs?
Silicon
Germanium
Cadmium compounds
Gallium arsenide
What is the primary function of an optical coupling device?
To amplify signals
To separate electrical potentials
To store energy
To convert AC to DC
What happens to the resistance of a varistor as the voltage increases?
It increases
It decreases
It remains constant
It fluctuates
What is the purpose of phase angle control in a thyristor circuit?
To increase voltage
To decrease current
To regulate power output
To store energy
What does TRIAC stand for?
Triode alternating current switch
Triode alternating current converter
Triode alternating current amplifier
Triode alternating current rectifier
What component in a dimmer switch circuit adjusts the charging time of the capacitor?
Diode
Resistor
Inductor
Transformer
What are the three terminals of a transistor called?
Anode, Cathode, Gate
Source, Drain, Gate
Emitter, Base, Collector
Positive, Negative, Ground
What is the ratio of the collector current to the base current called?
Voltage gain
Current gain
Power gain
Resistance gain
In a transistor switching stage, what does a high resistance state indicate?
Switch open
Switch closed
High current flow
Low voltage
What is a major advantage of integrated circuits?
Large size
High density of components
High cost
Easy to repair
What type of amplifier is an operational amplifier always?
Single-ended amplifier
Differential amplifier
Power amplifier
Voltage amplifier
Which of the following is a standard configuration of an operational amplifier?
Inverting amplifier
Non-inverting amplifier
Adding amplifier
All of the above
What does a P-regulator do?
It integrates the input voltage
It differentiates the input voltage
It maintains a fixed ratio between input and output voltage
It amplifies the input voltage
What is a common material used for printed circuit boards?
Copper laminated paper
Aluminum foil
Steel plates
Plastic sheets
What is the main disadvantage of the subtractive process in PCB manufacturing?
It is expensive
It wastes valuable copper material
It is time-consuming
It requires specialized equipment
What is the primary use of synchros in servomechanisms?
To amplify signals
To transmit and measure angles
To store energy
To convert AC to DC
What is the main difference between open loop and closed loop systems?
Open loop systems are more accurate
Closed loop systems use feedback signals
Open loop systems are more complex
Closed loop systems are less reliable
What is the typical excitation voltage for synchros?
5 volts
15 volts
26 volts or 115 volts
230 volts
What is the function of a torque synchro?
To generate torque
To amplify signals
To store energy
To convert AC to DC
What does a control synchro deliver?
Voltage
Torque
Power
Current
What is the primary application of a differential transmitter?
To amplify signals
To add or subtract angles
To store energy
To convert AC to DC
