Explore the essentials of basic electronics with these specially designed MCQs. Topics include semiconductors, diodes, and transistors. Keywords like “basic electronics MCQs for physics exams” and “semiconductors quiz questions” ensure a solid understanding for exams.
Which component is used to regulate voltage in a circuit?
a) Resistor
b) Capacitor
c) Transistor
d) Diode
What is the unit of electrical resistance?
a) Volt
b) Ampere
c) Ohm
d) Watt
In a series circuit, the total resistance is equal to:
a) The sum of all individual resistances
b) The average of all individual resistances
c) The product of all individual resistances
d) The maximum of all individual resistances
Which type of semiconductor has excess electrons as charge carriers?
a) P-type
b) N-type
c) Z-type
d) D-type
What is the name of the process in which a diode allows current flow in only one direction?
a) Reverse osmosis
b) Forward biasing
c) Transduction
d) Rectification
Which electronic component stores electrical charge?
a) Inductor
b) Capacitor
c) Transformer
d) Potentiometer
What is the basic unit of capacitance?
a) Farad
b) Ohm
c) Henry
d) Volt
What is the term used to describe the time it takes for a capacitor to charge to about
63.2% of its maximum voltage through a resistor?
a) Time constant
b) Time lag
c) Delay time
d) Charging period
In a parallel circuit, the voltage across each component is:
a) Different
b) The same
c) Inversely proportional
d) Constantly changing
What is the process of converting an AC voltage to DC voltage called?
a) Amplification
b) Modulation
c) Rectification
d) Oscillation
Which electronic component is commonly used as an amplifier?
a) Resistor
b) Inductor
c) Diode
d) Transistor
What is the term used to describe the bending of light as it passes through a transparent material with varying refractive indices?
a) Diffraction
b) Dispersion
c) Reflection
d) Refraction
Which semiconductor material is commonly used to make light-emitting diodes (LEDs)?
a) Silicon
b) Germanium
c) Gallium arsenide
d) Carbon
What is the purpose of a rectifier in a power supply circuit?
a) To increase the voltage
b) To store electrical charge
c) To convert AC to DC
d) To regulate current flow
Which electronic component acts as a one-way valve for electric current?
a) Capacitor
b) Transistor
c) Resistor
d) Diode
What is the basic unit of frequency?
a) Hertz
b) Watt
c) Joule
d) Ohm
The gain of an amplifier is defined as:
a) The input voltage divided by the output voltage
b) The output voltage divided by the input voltage
c) The product of input and output voltages
d) The difference between input and output voltages
In a P-type semiconductor, the majority charge carriers are:
a) Electrons
b) Holes
c) Protons
d) Neutrons
Which type of circuit consists of only one closed-loop path for current to flow?
a) Series circuit
b) Parallel circuit
c) Open circuit
d) Complex circuit
What is the term used to describe the sudden flow of current through a diode when the reverse voltage across it exceeds its breakdown voltage?
a) Zener effect
b) Avalanche effect
c) Leakage effect
d) Diode effect
The process of converting sound waves into electrical signals is known as:
a) Amplification
b) Modulation
c) Demodulation
d) Transduction
What is the name of the electronic component that is sensitive to light and used in optical communication systems?
a) Photodiode
b) Thermistor
c) Optocoupler
d) Phototransistor
Which electronic component is commonly used to protect other circuit components from excessive current flow?
a) Diode
b) Capacitor
c) Fuse
d) Inductor
The process of encoding information on a carrier wave is known as:
a) Demodulation
b) Modulation
c) Oscillation
d) Rectification
What is the name of the process in which an insulator becomes temporarily conductive due to high voltage?
a) Ionization
b) Polarization
c) Conduction
d) Saturation
In a parallel circuit, the total current is equal to:
a) The sum of all individual currents
b) The average of all individual currents
c) The product of all individual currents
d) The maximum of all individual currents
Which semiconductor component is used for voltage regulation in power supplies?
a) Resistor
b) Capacitor
c) Zener diode
d) Transistor
The process of combining an audio or video signal with a carrier wave is known as:
a) Amplification
b) Demodulation
c) Modulation
d) Rectification
What is the name of the principle that states the voltage across a resistor is directly proportional to the current flowing through it?
a) Faraday’s law
b) Kirchhoff’s law
c) Ohm’s law
d) Lenz’s law
Which type of diode emits light when current flows through it?
a) Schottky diode
b) Zener diode
c) Light-emitting diode (LED)
d) Photodiode
What is the term used to describe the change in direction of a wave as it encounters an obstacle or passes through an opening?
a) Reflection
b) Absorption
c) Diffraction
d) Refraction
Which electronic component is used to store digital data in computers and other digital devices?
a) Capacitor
b) Inductor
c) Resistor
d) Transistor
The symbol for a P-type semiconductor in a circuit diagram is:
a) A triangle pointing upwards
b) A triangle pointing downwards
c) An “N” shape
d) An “P” shape
What is the name of the electronic component that amplifies or switches electronic signals?
a) Resistor
b) Inductor
c) Capacitor
d) Transistor
What is the term used to describe the phenomenon where some of the electric charge is stored in the dielectric material of a capacitor?
a) Capacitance
b) Inductance
c) Leakage
d) Polarization
Which electronic component is commonly used to convert electrical energy into mechanical energy?
a) Capacitor
b) Transistor
c) Resistor
d) Motor
In a transistor, the middle layer is called:
a) Base
b) Emitter
c) Collector
d) Amplifier
What is the basic unit of inductance?
a) Volt
b) Henry
c) Farad
d) Ohm
Which electronic component is used to store one bit of data in computer memory?
a) Resistor
b) Capacitor
c) Transistor
d) Flip-flop
What is the name of the electronic component that functions as a voltage-controlled switch?
a) Resistor
b) Capacitor
c) Diode
d) Transistor
The process of removing high-frequency noise from a signal is called:
a) Amplification
b) Demodulation
c) Modulation
d) Filtering
In which type of semiconductor, the majority charge carriers are negatively charged electrons?
a) N-type
b) P-type
c) D-type
d) Z-type
What is the term used to describe the characteristic of an inductor opposing changes in current?
a) Resistance
b) Capacitance
c) Inductance
d) Reactance
Which electronic component is commonly used to step up or step down voltage in a power supply?
a) Resistor
b) Capacitor
c) Transformer
d) Diode
What is the term used to describe the bending of an electron beam in a cathode ray tube
(CRT)?
a) Reflection
b) Deflection
c) Refraction
d) Diffraction
Which type of diode is commonly used as a voltage regulator?
a) Zener diode
b) Schottky diode
c) Photodiode
d) Light-emitting diode (LED)
The process of converting digital data into analog signals for transmission is known as:
a) Modulation
b) Demodulation
c) Encoding
d) Decoding
Which electronic component is used to amplify the strength of an electrical signal?
a) Transistor
b) Diode
c) Resistor
d) Capacitor
What is the name of the electronic component that stores multiple bits of data in computer memory?
a) Resistor
b) Capacitor
c) Transistor
d) Register
In a series circuit, the current through each component is:
a) Different
b) The same
c) Inversely proportional
d) Constantly changing
What is the term used to describe the rapid back-and-forth movement of an AC current?
a) Amplification
b) Rectification
c) Oscillation
d) Modulation
Which semiconductor component is commonly used as a voltage regulator?
a) Resistor
b) Capacitor
c) Zener diode
d) Transistor
The process of combining an audio or video signal with a carrier wave is known as:
a) Amplification
b) Demodulation
c) Modulation
d) Rectification
What is the name of the principle that states the voltage across a resistor is directly proportional to the current flowing through it?
a) Faraday’s law
b) Kirchhoff’s law
c) Ohm’s law
d) Lenz’s law
Which type of diode emits light when current flows through it?
a) Schottky diode
b) Zener diode
c) Light-emitting diode (LED)
d) Photodiode
What is the term used to describe the change in direction of a wave as it encounters an obstacle or passes through an opening?
a) Reflection
b) Absorption
c) Diffraction
d) Refraction
Which electronic component is used to store digital data in computers and other digital devices?
a) Capacitor
b) Inductor
c) Resistor
d) Transistor
The symbol for a P-type semiconductor in a circuit diagram is:
a) A triangle pointing upwards
b) A triangle pointing downwards
c) An “N” shape
d) An “P” shape
What is the name of the electronic component that amplifies or switches electronic signals?
a) Resistor
b) Inductor
c) Capacitor
d) Transistor
What is the term used to describe the phenomenon where some of the electric charge is stored in the dielectric material of a capacitor?
a) Capacitance
b) Inductance
c) Leakage
d) Polarization
If you are interested to enhance your knowledge regarding Physics, Chemistry, Biology, and Computer please click on the link of each category, you will be redirected to dedicated website for each category.
