An ideal diode presents a(n)______ when reversed-biased and a(n) __________ when forward-biased.
- Open, short
- Short, open
- Open, open
- Short, short
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
Top Questions on Semiconductor electronics: materials, devices and simple circuits
- A voltage regulating circuit consisting of a Zener diode having breakdown voltage of $10\,\text{V}$ and maximum power dissipation of $0.4\,\text{W}$ is operated at $15\,\text{V}$. The approximate value of protective resistance in this circuit is ___ $\Omega$.
- JEE Main - 2026
- Physics
- Semiconductor electronics: materials, devices and simple circuits
- In hydrogen atom spectrum, (R → Rydberg's constant)
A. the maximum wavelength of the radiation of Lyman series is 4/3R
B. the Balmer series lies in the visible region of the spectrum
C. the minimum wavelength of the radiation of Paschen series is 9/R
D. the minimum wavelength of Lyman series is 5/4R
Choose the correct answer from the options given below :- JEE Main - 2026
- Physics
- Semiconductor electronics: materials, devices and simple circuits
Assuming in forward bias condition there is a voltage drop of \(0.7\) V across a silicon diode, the current through diode \(D_1\) in the circuit shown is ________ mA. (Assume all diodes in the given circuit are identical)
- JEE Main - 2026
- Physics
- Semiconductor electronics: materials, devices and simple circuits
- The correct truth table for the given input data of the following logic gate is:
- JEE Main - 2026
- Physics
- Semiconductor electronics: materials, devices and simple circuits
For the given logic gate circuit, which of the following is the correct truth table ?
- JEE Main - 2026
- Physics
- Semiconductor electronics: materials, devices and simple circuits
Questions Asked in SRMJEEE exam
- Markovnikov's rule is applicable to which of the following reactions?
- SRMJEEE - 2025
- Chemical Reactions
- Calculate the Reynolds number for a liquid with density 1 g/cm³ and viscosity 8 × 10⁻⁴ Pa·s, flowing at 0.5 m/s through a pipe of diameter 4 cm.
- SRMJEEE - 2025
- Viscosity
- A current of 2 A passes through a coil of 100 turns, producing a magnetic flux of 5 × 10⁻⁵ Wb per turn. What is the magnetic energy associated with the coil?
- SRMJEEE - 2025
- Magnetic Field
- A box contains 5 red balls and 7 blue balls. Two balls are drawn at random without replacement. What is the probability that both balls are red?
- SRMJEEE - 2025
- Probability
- The molar conductivities at infinite dilution for Na₂SO₄, K₂SO₄, KCl, HCl, and HCOONa at 300 K are 260, 308, 150, 426, and 105 S·cm²·mol⁻¹, respectively. What will be the molar conductivity at infinite dilution (Λ⁰) for formic acid in the same unit?
- SRMJEEE - 2025
- Mole concept and Molar Masses
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.