What is the primary function of a diode in modern electronics?
a) To store electrical energy
b) To allow current to flow in only one direction
c) To increase current flow
d) To amplify electrical signals
Which semiconductor material is most commonly used in the production of diodes?
a) Copper
b) Silicon
c) Gold
d) Lead
What is the main purpose of a transistor in electronic circuits?
a) To store data
b) To amplify signals
c) To convert AC to DC
d) To filter electrical noise
Which type of transistor is most widely used in modern electronics?
a) Field-effect transistor (FET)
b) Bipolar junction transistor (BJT)
c) Insulated-gate bipolar transistor (IGBT)
d) Junction field-effect transistor (JFET)
What does the acronym “MOSFET” stand for?
a) Metal-Oxide Semiconductor Field-Effect Transistor
b) Magnetic-Oxide Semiconductor Field-Effect Transistor
c) Metal-Oxide Silicon Field-Effect Transistor
d) Magnetic-Oxide Silicon Field-Effect Transistor
What is the primary use of a light-emitting diode (LED)?
a) To store energy
b) To emit light when current flows through it
c) To amplify signals
d) To convert AC to DC
Which of the following semiconductor devices is used in radio receivers for signal detection?
a) Diode
b) LED
c) Capacitor
d) Resistor
What is the main advantage of using a photodiode in optical communication?
a) High voltage output
b) Ability to detect light signals
c) High current handling capacity
d) High thermal resistance
What is the purpose of a Zener diode in electronic circuits?
a) To amplify signals
b) To limit voltage to a specific value
c) To convert AC to DC
d) To emit light
Which of the following is a characteristic of a Schottky diode?
a) High forward voltage drop
b) Low reverse recovery time
c) High amplification factor
d) Ability to emit light
What type of semiconductor device is commonly used for power regulation in electrical systems?
a) Diode
b) Rectifier
c) Voltage regulator
d) Capacitor
Which type of semiconductor device is used in modern solar power systems?
a) Photodiode
b) Solar cell
c) LED
d) Transistor
What is the main principle behind the operation of a photovoltaic cell?
a) Conversion of light energy into electrical energy
b) Conversion of mechanical energy into electrical energy
c) Storage of electrical energy
d) Conversion of electrical energy into light energy
Which semiconductor device is used in microwave frequency applications, such as radar systems?
a) Light-emitting diode
b) Tunnel diode
c) Transistor
d) Solar cell
Which type of transistor is often used in digital logic circuits?
a) Field-effect transistor (FET)
b) Bipolar junction transistor (BJT)
c) Both FET and BJT
d) Light-emitting diode
Which type of semiconductor device is used to protect circuits from high voltage surges?
a) Zener diode
b) Light-emitting diode
c) Transistor
d) Rectifier
What is the primary use of a varactor diode?
a) Amplification of signals
b) Signal modulation and frequency tuning
c) Voltage regulation
d) Conversion of light into electrical energy
What is a key characteristic of a bipolar junction transistor (BJT)?
a) It amplifies signals using electron motion only
b) It amplifies signals using both electron and hole motion
c) It requires no external biasing
d) It can only be used as a switch
What semiconductor material is most commonly used for high-power electronic applications?
a) Silicon
b) Gallium arsenide
c) Germanium
d) Copper
Which semiconductor device is used in oscillators and frequency modulators?
a) Diode
b) LED
c) Transistor
d) Rectifier
Which type of diode is commonly used in power rectifiers for converting AC to DC?
a) Zener diode
b) Schottky diode
c) Light-emitting diode
d) P-N junction diode
What characteristic of a MOSFET makes it suitable for use in digital circuits?
a) High current gain
b) High input impedance
c) Low thermal resistance
d) High frequency response
What is the primary role of an IGBT (Insulated-Gate Bipolar Transistor)?
a) To amplify audio signals
b) To provide high-speed switching in power electronics
c) To store electrical charge
d) To emit light in optical applications
Which type of semiconductor device is used to regulate the output voltage in power supplies?
a) Transistor
b) Zener diode
c) LED
d) Photodiode
What is the function of a phototransistor?
a) To emit light
b) To detect light and convert it into an electrical signal
c) To amplify sound signals
d) To store data
Which semiconductor device is commonly used in audio amplifiers?
a) LED
b) Diode
c) Transistor
d) Solar cell
What is the primary feature of a Schottky barrier diode?
a) Low forward voltage drop
b) High reverse breakdown voltage
c) High signal amplification
d) High light emission
What is the purpose of a photodiode in a solar panel?
a) To regulate the current
b) To absorb sunlight and convert it to energy
c) To amplify the signal
d) To store energy
What type of semiconductor material is used in high-efficiency solar cells?
a) Silicon
b) Gallium arsenide
c) Germanium
d) Copper
What is the main application of a phototransistor?
a) Signal amplification in radio
b) Light detection and conversion to electrical signals
c) Power conversion
d) Storing digital data
What is a common use of the junction field-effect transistor (JFET)?
a) Audio signal amplification
b) Voltage regulation
c) Frequency modulation
d) Switches in digital circuits
