Question:
An ideal diode presents a(n)______ when reversed-biased and a(n) __________ when forward-biased.
An ideal diode presents a(n)______ when reversed-biased and a(n) __________ when forward-biased.
Updated On: Jun 13, 2025
- Open, short
- Short, open
- Open, open
- Short, short
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The Correct Option is A
Solution and Explanation
Understanding the Problem:
- An ideal diode is a theoretical electronic component with perfect switching characteristics
- It has two operating states: reverse-biased and forward-biased
- We need to determine its equivalent circuit in both states
Key Concepts:
- Forward-biased: Allows current to flow freely (ideally zero resistance)
- Reverse-biased: Blocks all current flow (ideally infinite resistance)
Let's denote:
- Forward-biased state: V > 0
- Reverse-biased state: V ≤ 0
Diode Behavior Equations:
- Forward-biased: R = 0 (short circuit)
- Reverse-biased: R → ∞ (open circuit)
Analyzing the Options:
Option 1: Open, short
- Reverse: Open circuit (correct)
- Forward: Short circuit (correct)
Option 2: Short, open
- Reverse: Short circuit (incorrect)
- Forward: Open circuit (incorrect)
Option 3: Open, open
- Both states open (incorrect)
Option 4: Short, short
- Both states short (incorrect)
Conclusion:
An ideal diode presents:
- An open circuit when reverse-biased
- A short circuit when forward-biased
Therefore, the correct answer is: Open, short
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Concepts Used:
Semiconductors
Semiconductors are a crystalline solid materials, whose electrical conductivity lies between a conductor and an insulator. Semiconductors are mainly used in the manufacturing of electronic devices like capacitors, transistors, diodes, Integrated circuits, etc.
Properties of Semiconductor:
- Semiconductor acts like an insulator at Zero Kelvin. On increasing the temperature, it works as a conductor.
- Due to their exceptional electrical properties, semiconductors can be modified by doping to make semiconductor devices suitable for energy conversion, switches, and amplifiers.
- Lesser power losses.
Uses of Semiconductor:
- Semiconductors are widely used in manufacturing electronics devices like transistors, diodes, sensors, integrated circuits.
- Semiconductors are widely used in all electronic devices, like mobile phones, digital cameras, communication devices, trains, ATMs, etc.