General Studies & Exam Prep•Updated for 2026 Competitive Exams
Basic Electronics MCQS with Answers
Practice top multiple choice questions (MCQs), topic summary, and verified answers for Basic Electronics MCQS with Answers. Essential for Central & State competitive examinations. Solve these high-frequency practice questions with step-by-step solutions to evaluate your preparation level.
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Practice Questions & Explanations (20 Questions)
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Q1RRB ALPEasy
What is the unit of electrical resistance?
Q2SSC JEEasy
Which component is used to store electrical charge?
Q3State PSCMedium
A semiconductor doped with pentavalent impurities is called a:
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Q4RRB JEEasy
Which electronic device allows current to flow in only one direction?
Q5SSC CHSLEasy
What does LED stand for?
Q6RRB ALPEasy
According to Ohm's Law, the relationship between voltage (V), current (I), and resistance (R) is:
Q7SSC JEMedium
The process of converting AC into DC is called:
Q8UPSC / RRBMedium
Which type of logic gate outputs 1 only if all its inputs are 1?
Q9RRB JEMedium
A transistor operates primarily as a:
Q10SSCEasy
What is the common base material used to manufacture most integrated circuits (ICs)?
Q11GATE / ISROHard
In an ideal op-amp, the input impedance is:
Q12RRB JEMedium
The Zener diode is primarily used for:
Q13SSC JEMedium
Which rule states that the algebraic sum of all currents meeting at a node is zero?
Q14RRB ALPEasy
A half-wave rectifier uses how many diodes?
Q15State ExamsEasy
The unit of Inductance is the:
Q16SSC JEHard
In a Bipolar Junction Transistor (BJT), the heavily doped region is the:
Q17RRB JEMedium
Which logic gate is known as the 'Universal Gate'?
Q18SSCEasy
An alternating current (AC) is characterized by:
Q19RRB ALPMedium
What is the equivalent resistance when two 10 Ohm resistors are connected in parallel?
Q20SSC JEMedium
A step-up transformer increases the:
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