SS1 Second Term Basic Electronics Past Questions And Answers
20 Basic electronics questions for SS1 Second Term, along with options and answers:
Question: What is the primary function of a zener diode?
A) To amplify signals
B) To regulate voltage
C) To control current flow
D) To store charge
Answer: B) To regulate voltage
Question: The unit of electromotive force (EMF) is:
A) Volt
B) Ampere
C) Ohm
D) Joule
Answer: A) Volt
Question: Which electronic component stores binary data in computers?
A) Transistor
B) Resistor
C) Capacitor
D) Memory (RAM)
Answer: D) Memory (RAM)
Question: What does PWM stand for in electronics?
A) Pulse Width Modulation
B) Power Watt Management
C) Parallel Wave Multiplexing
D) Phase Width Modulation
Answer: A) Pulse Width Modulation
Question: In a parallel circuit, the voltage across each component is:
A) The sum of individual voltages
B) The average of individual voltages
C) Equal to the total voltage
D) Dependent on resistance
Answer: C) Equal to the total voltage
Question: What is the purpose of a rectifier in electronics?
A) To regulate voltage
B) To convert AC to DC
C) To control current flow
D) To store charge
Answer: B) To convert AC to DC
Question: Which type of semiconductor material has excess electrons?
A) P-type
B) N-type
C) Insulator
D) Conductor
Answer: B) N-type
Question: What is the function of a potentiometer in a circuit?
A) To amplify signals
B) To measure resistance
C) To vary voltage
D) To store energy
Answer: C) To vary voltage
Question: Which law states that the total voltage in a closed loop is equal to the sum of the individual voltage drops?
A) Ohm’s Law
B) Kirchhoff’s Current Law
C) Kirchhoff’s Voltage Law
D) Faraday’s Law
Answer: C) Kirchhoff’s Voltage Law
Question: The basic building block of digital circuits is:
A) Capacitor
B) Resistor
C) Transistor
D) Inductor
Answer: C) Transistor
Question: What is the unit of magnetic flux?
A) Weber
B) Gauss
C) Tesla
D) Henry
Answer: A) Weber
Question: Which device is used to change the voltage of an alternating current?
A) Diode
B) Transformer
C) Resistor
D) Capacitor
Answer: B) Transformer
Question: The process of converting digital signals to analog signals is called:
A) Modulation
B) Demodulation
C) Amplification
D) Oscillation
Answer: A) Modulation
Question: What is the purpose of an oscillator in electronics?
A) To regulate voltage
B) To generate a periodic waveform
C) To control current flow
D) To store charge
Answer: B) To generate a periodic waveform
Question: Which component is used to amplify weak electronic signals?
A) Capacitor
B) Inductor
C) Resistor
D) Amplifier
Answer: D) Amplifier
Question: The unit of inductance is:
A) Henry
B) Farad
C) Ohm
D) Volt
Answer: A) Henry
Question: What is the purpose of a relay in a circuit?
A) To regulate voltage
B) To amplify signals
C) To switch high-power circuits using low-power signals
D) To store charge
Answer: C) To switch high-power circuits using low-power signals
Question: Which type of circuit allows current to flow in multiple paths?
A) Series circuit
B) Parallel circuit
C) Combination circuit
D) Open circuit
Answer: B) Parallel circuit
Question: The unit of electric charge is:
A) Volt
B) Ampere-hour
C) Ohm
D) Watt
Answer: B) Ampere-hour
Question: What is the role of a multimeter in electronics?
A) To measure resistance
B) To measure voltage, current, and resistance
C) To amplify signals
D) To regulate voltage
Answer: B) To measure voltage, current, and resistance.
