SS2 Second Term Basic Electronics Past Questions And Answers
Basic Electronics questions for SS2 Second Term:
Question: What is the primary function of a multimeter in electronics?
a) Measure voltage, current, and resistance
b) Generate signals
c) Store electrical energy
d) Convert AC to DC
Answer: a) Measure voltage, current, and resistance
Question: Which type of capacitor has a dielectric made of an insulating material with a high dielectric constant?
a) Ceramic capacitor
b) Electrolytic capacitor
c) Variable capacitor
d) Tantalum capacitor
Answer: b) Electrolytic capacitor
Question: What does PCB stand for in electronics?
a) Printed Circuit Board
b) Programmable Circuit Breaker
c) Parallel Circuit Base
d) Power Control Block
Answer: a) Printed Circuit Board
Question: In a transistor, what are the three layers called?
a) Collector, Base, Amplifier
b) Emitter, Diode, Collector
c) Base, Diode, Emitter
d) Collector, Base, Emitter
Answer: d) Collector, Base, Emitter
Question: Which logic gate performs the AND operation?
a) OR gate
b) NOT gate
c) AND gate
d) XOR gate
Answer: c) AND gate
Question: What is the purpose of an operational amplifier (op-amp) in electronic circuits?
a) Amplify signals
b) Store electrical energy
c) Convert AC to DC
d) Control voltage
Answer: a) Amplify signals
Question: Which semiconductor device is commonly used as a voltage regulator?
a) Zener diode
b) Light-emitting diode
c) Schottky diode
d) Tunnel diode
Answer: a) Zener diode
Question: What is the function of a relay in an electronic circuit?
a) Amplify signals
b) Control voltage
c) Switch high-power loads using a low-power signal
d) Convert AC to DC
Answer: c) Switch high-power loads using a low-power signal
Question: Which type of circuit is designed to provide a stable output voltage regardless of input voltage changes?
a) Amplifier circuit
b) Oscillator circuit
c) Voltage regulator circuit
d) Transformer circuit
Answer: c) Voltage regulator circuit
Question: What does PWM stand for in electronics?
a) Pulse Width Modulation
b) Power Wave Manipulation
c) Parallel Wave Modulation
d) Phase Width Modulation
Answer: a) Pulse Width Modulation
Question: Which electronic component is used to store data in digital circuits?
a) Resistor
b) Capacitor
c) Diode
d) Flip-flop
Answer: d) Flip-flop
Question: What is the purpose of a thyristor in electronic circuits?
a) Store electrical energy
b) Amplify signals
c) Control high-power loads
d) Convert AC to DC
Answer: c) Control high-power loads
Question: Which type of display technology is commonly used in digital watches and calculators?
a) LED display
b) LCD display
c) OLED display
d) Plasma display
Answer: a) LED display
Question: What is the purpose of a counter in digital circuits?
a) Control voltage
b) Store electrical energy
c) Count and display pulses or events
d) Convert AC to DC
Answer: c) Count and display pulses or events
Question: Which electronic component is used to store a small amount of electrical charge?
a) Resistor
b) Capacitor
c) Inductor
d) Diode
Answer: b) Capacitor
Question: What is the function of a microcontroller in electronic systems?
a) Generate signals
b) Control voltage
c) Store electrical energy
d) Perform digital control functions
Answer: d) Perform digital control functions
Question: Which type of oscillator is commonly used in radio frequency (RF) circuits?
a) Crystal oscillator
b) RC oscillator
c) LC oscillator
d) Relaxation oscillator
Answer: a) Crystal oscillator
Question: What is the purpose of a choke in a power supply circuit?
a) Control voltage
b) Amplify signals
c) Filter out high-frequency noise
d) Convert AC to DC
Answer: c) Filter out high-frequency noise
Question: Which type of memory retains data even when the power is turned off?
a) RAM (Random Access Memory)
b) ROM (Read-Only Memory)
c) EEPROM (Electrically Erasable Programmable Read-Only Memory)
d) Flash memory
Answer: b) ROM (Read-Only Memory)
Question: In a digital communication system, what does UART stand for?
a) Universal Analog Receiver-Transmitter
b) Universal Asynchronous Receiver-Transmitter
c) Unitary Analog Resonance Transceiver
d) Unilateral Asynchronous Receiver-Transmitter
Answer: b) Universal Asynchronous Receiver-Transmitter.
