In a common emitter amplifier, the phase difference between input and output voltage is:
1
2
3
4
Official Solution
Correct Option:
(3)
Step 1: Concept
Phase relationship depends on the transistor configuration. Step 2: Analysis
In a common emitter (CE) configuration, an increase in base-emitter voltage increases collector current, which increases the voltage drop across the load resistor, thereby decreasing the output collector voltage. Step 3: Conclusion
This inverse relationship results in a phase shift. Final Answer: (C)
02
PYQ 2009
medium
physicsID: met-2009
A diabetic person carries a packet of glucose with him always, because
1
glucose reduces the blood sugar level slowly
2
glucose increases the blood sugar level slowly
3
glucose reduces the blood sugar level
4
glucose increases the blood sugar level almost instantaneously
Official Solution
Correct Option:
(4)
Step 1: Medical Risk
Diabetic patients are prone to sudden, dangerous drops in blood sugar (hypoglycemia). Step 2: Glucose Function
Glucose is a simple sugar that is absorbed directly into the bloodstream without needing digestion. Step 3: Conclusion
Carrying glucose allows the patient to raise their blood sugar level almost instantaneously in case of a sudden drop. Final Answer: (d)
03
PYQ 2020
medium
physicsID: met-2020
What is the current through the circuit and the potential difference across the diode shown in the figure. The drift current for the diode is .
1
2
3
4
Official Solution
Correct Option:
(1)
Concept:
In reverse bias, diode current is approximately equal to drift current (very small and constant). Step 1: Identify diode condition.
From the circuit, diode is reverse biased. Step 2: Voltage drop across resistor.
Step 3: Voltage across diode.
04
PYQ 2020
medium
physicsID: met-2020
The effect of reverse bias in a junction diode on its potential barrier is:
1
increases
2
decreases
3
remains same
4
None of these
Official Solution
Correct Option:
(1)
Concept:
Reverse bias widens depletion region. Step 1: Effect on charges.
Charges are pulled away from junction. Step 2: Result.
Potential barrier increases.
05
PYQ 2024
medium
physicsID: met-2024
In the circuit shown, diode has forward resistance. When increases from to , change in current is . Find .
Official Solution
Correct Option:
(1)
Concept: •Diode conducts only when (cut-in voltage)
•When OFF → current = 0
•When ON → use Ohm’s law with total resistance Step 1:Total resistance (ON state)
Step 2:At
Step 3:At
Step 4:Change in current
Conclusion
About Applications Of Diode - MET
Applications Of Diode is a vital chapter for MET aspirants. Mastering the concepts covered in this chapter is essential for securing a top rank.
By rigorously practicing the previous year questions associated with this chapter, you can identify high-yield topics, understand the examiner's perspective, and boost your confidence during the actual exam.
Frequently Asked Questions
Why focus on Applications Of Diode PYQs?
Analyzing PYQs for this specific chapter reveals the most frequently tested concepts and the typical complexity of questions, allowing you to tailor your study plan efficiently.
How to best use this analysis?
Review the topic breakdown to see which sub-topics within Applications Of Diode carry the most weight. Then, tackle the questions iteratively to solidify your understanding.
