MDCAT Electronics MCQs
Customize your practice drill: select target topics, configure your question limit (up to 180 MCQs per test), and choose your mode.
Total Topics
2
Selected Topics
1
Available MCQs
183
Question Limit
Up to 180
Select Topics to Practice
Questions will be drawn only from checked topics.
Test Configuration
Configure question count (limit 180) and testing mode.
Selected topics have 183 total questions. Test will draw 50 shuffled MCQs.
Sample Electronics MCQs with answers
Try these questions, then open the answer to check your reasoning. Use the quiz above for more topics and a complete review.
Rectification
1. Consider a peak rectifier fed by a 60-Hz sinusoid having a peak value Let the load resistance Calculate the fraction of the cycle during which the diode is conducting:
- A. 1.06 %
- B. 2.06 %
- C. 3.18 %
- D. 4.82 %
View answer and explanation
Answer: C. 3.18 %
This is the peak-rectifier conduction-angle problem. The diode conducts only for a short interval near the input peak to recharge the filter capacitor, with the fraction of the cycle about (1/2pi) times sqrt(2Vr/Vp). Using the standard ripple V with V gives (1/2pi) times sqrt(0.04), about 0.0318 or 3.18 percent. Smaller fractions would mean smaller ripple and larger ones larger ripple.
PN Junction
2. A diode has p-side at + and n-side at . It is:
- A. reverse-biased
- B. unbiased with maximum current
- C. forward-biased
- D. necessarily in breakdown
View answer and explanation
Answer: C. forward-biased
A diode is forward-biased when the p-side/anode is at higher potential than the n-side/cathode.
PN Junction
3. Which of the following is a digital quantity?
- A. Height of a person
- B. Speed of a car
- C. Number of students in a class
- D. Temperature of a room
View answer and explanation
Answer: C. Number of students in a class
Digital quantities take discrete, whole-number values — the number of students in a class can only be 0, 1, 2, …, never 23.5. Height, speed, and temperature vary continuously and are analog quantities. This discrete-vs-continuous distinction is the basis of digital electronics.
About this unit
MDCAT Electronics — Unit 49
450 practice MCQs covering Rectification, PN Junction. Select custom topics and sit tailored tests up to 180 questions per drill.
Common questions about Electronics practice
How many Electronics MCQs are available on DIFF. MDCAT?
The current Electronics question bank contains 450 practice MCQs across 2 topics. This is the bank size, not the length of one test. Choose your topics and a question count from 1 to 180, limited by the questions available in those topics.
Which topics does the Electronics quiz cover?
The selectable topics are Rectification, PN Junction. Use Select all for a broad chapter drill, Clear to start a focused selection, or choose individual topics. Questions are drawn from your chosen topics, so you can target a weak concept before returning to a wider test.
How do I build a custom Electronics test?
Open the chapter builder, select one or more topics, enter your question count, and choose Tutor Mode or Timed Exam. The available-question total updates with your selection. Start Test generates a shuffled drill; you do not have to follow a fixed Quiz 1 or Quiz 2 sequence.
What is the difference between Tutor Mode and Timed Exam?
Tutor Mode gives feedback and an explanation after you choose an option, and you can change or clear that choice. Timed Exam runs a countdown and keeps explanations hidden until submission. Both modes let you move between questions, use the paper map, and submit for a complete review.
How do I review and download my Electronics quiz?
Select Submit Quiz, then Submit & View Explanations. The review includes every question in your test, all options, your selection, the marked correct answer when a key is available, and the explanation. Download PDF saves a paginated review; Download Review saves an HTML copy you can open in a browser. The review also includes DIFF. MDCAT community links.
How should I use Electronics MCQs to improve?
Start with a short tutor drill on one of these topics: Rectification, PN Junction. Read the explanation for incorrect and uncertain answers, revise the relevant textbook section, and retry before taking a timed drill. Compare your reasoning with the answer key rather than memorising the option letter.