BASIC ELECTRONICS Solved MCQs

By: Prof. Dr. Fazal Rehman | Last updated: April 30, 2025

1. : A logic circuit that can add two 1-bit numbers and produce outputs for sum and carry is called:
(A) Full adder
(B) Semi adder
(C) Half adder
(D) Double adder

2. : An ordinary transistor is:
(A) Dipolar
(B) Tripolar
(C) Bipolar
(D) Tetra polar

3. : What does the word “hybrid” mean?
(A) Unique
(B) Single
(C) Dual
(D) None of these

4. : When the current in the primary coil of a transformer is changed, it induces change in the magnetic field of:
(A) Capacitor
(B) Transistor
(C) Resistor
(D) Secondary coil

5. : We use a half-wave rectifier:
(A) To run AC care
(B) To run car radios
(C) To run batteries
(D) To run tape recorders

6. : A Zener diode is a:
(A) Current stabilizer
(B) Voltage stabilizer
(C) Resistance stabilizer
(D) None of these

7. : We can construct an Exclusive-OR gate using which other gates?
(A) AND, NOT, and OR gate only
(B) AND and NAND gate only
(C) OR gate only
(D) All of these

8. : The unit of resistance is:
(A) Ampere
(B) Ohm
(C) EMF
(D) None of these

9. : The transistor amplifier equation is V_CE = V_CB + _____:
10. : In a reverse-biased junction, its barrier potential will be:
(A) Decreased
(B) Remain same
(C) Increased
(D) Continuously change

11. : Mutual induction depends on:
(A) Resistance changes
(B) Current changes
(C) Voltage changes
(D) None of the above

12. : A transformer used to convert unbalanced signals to balanced signals is called a:
(A) Auto-transformer
(B) Balun
(C) Step-up transformer
(D) Step-down transformer