SS3 Third Term Basic Electronics Past Questions And Answers
SS3 Third Term with options and answers:
Question: The process of converting a DC signal to AC is known as:
A) Rectification
B) Amplification
C) Oscillation
D) Inversion
Answer: D) Inversion
Question: What is the unit of frequency in electronics?
A) Hertz
B) Farad
C) Henry
D) Ohm
Answer: A) Hertz
Question: Which electronic component is commonly used to store program instructions in a computer?
A) Transistor
B) Resistor
C) Capacitor
D) Memory chip
Answer: D) Memory chip
Question: The process of modulating a carrier wave with an audio signal is used in:
A) AM radio
B) FM radio
C) Both AM and FM radio
D) Television
Answer: C) Both AM and FM radio
Question: Which type of diode emits light when forward-biased?
A) Zener diode
B) Schottky diode
C) Light Emitting Diode (LED)
D) Varactor diode
Answer: C) Light Emitting Diode (LED)
Question: The term ‘resonance’ in electronics refers to:
A) Voltage drop across a resistor
B) The frequency at which capacitive and inductive reactances are equal
C) Magnetic field strength
D) Current flow in a closed circuit
Answer: B) The frequency at which capacitive and inductive reactances are equal
Question: What is the primary function of a transformer in an electrical system?
A) Rectification
B) Voltage regulation
C) Signal amplification
D) Inductive coupling
Answer: D) Inductive coupling
Question: The process of encoding information in the form of a carrier wave is known as:
A) Modulation
B) Demodulation
C) Amplification
D) Rectification
Answer: A) Modulation
Question: What is the function of a multimeter in electronics?
A) Measure voltage, current, and resistance
B) Generate signals
C) Store data
D) Control frequency
Answer: A) Measure voltage, current, and resistance
Question: Which type of logic gate performs the OR operation?
A) AND gate
B) OR gate
C) NOT gate
D) XOR gate
Answer: B) OR gate
Question: In a transistor, what is the function of the emitter?
A) Amplify the signal
B) Control the flow of current
C) Act as a switch
D) Generate a magnetic field
Answer: B) Control the flow of current
Question: The process of converting an analog signal to a digital signal is called:
A) Modulation
B) Demodulation
C) Analog-to-digital conversion
D) Digital-to-analog conversion
Answer: C) Analog-to-digital conversion
Question: What is the primary purpose of a logic gate in digital circuits?
A) Amplify signals
B) Control current flow
C) Perform logical operations
D) Store data
Answer: C) Perform logical operations
Question: Which semiconductor material is used in the construction of solar cells?
A) Silicon
B) Germanium
C) Gallium arsenide
D) Zinc oxide
Answer: C) Gallium arsenide
Question: The process of converting digital signals to analog signals is called:
A) Modulation
B) Demodulation
C) Analog-to-digital conversion
D) Digital-to-analog conversion
Answer: D) Digital-to-analog conversion
Question: Which component is commonly used to stabilize voltage in power supplies?
A) Resistor
B) Capacitor
C) Zener diode
D) Inductor
Answer: C) Zener diode
Question: What is the purpose of a Schmitt trigger in electronics?
A) Signal amplification
B) Voltage regulation
C) Pulse shaping
D) Frequency modulation
Answer: C) Pulse shaping
Question: The process of converting digital information into a readable display is performed by:
A) LED
B) LCD
C) OLED
D) CRT
Answer: B) LCD
Question: Which type of memory retains data even when the power is turned off?
A) RAM
B) ROM
C) Cache memory
D) Flash memory
Answer: B) ROM
Question: What is the purpose of an op-amp (operational amplifier) in electronic circuits?
A) Voltage regulation
B) Signal amplification
C) Current control
D) Frequency modulation
Answer: B) Signal amplification.
