The JEE Main Physics section requires speed and accuracy, along with a thorough understanding of the applications of diode. This article provides a set of JEE Main PYQs on applications of diode to help you understand the topic and improve your problem-solving skills with the help of detailed solutions by ensuring conceptual clarity, which will help you in the JEE Main 2026 preparation.
Whether you're revising the basics or testing your knowledge, these JEE Main PYQs will serve as a valuable practice resource.
The JEE Main 2026 exam is likely to continue on the same pattern as JEE Main 2025. Out of 90 questions, students can expect a fair mix from all three subjects. To get an edge, going through JEE Main previous year questions (PYQs) is one of the best strategies.
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JEE Main PYQs on Applications of Diode
1.
A zener diode of power rating 1.6 W is used as a voltage regula tor. If the zener diode has a breakdown voltage of 8 V and it has to regulate voltage fluctuating between 3 V and 10 V, what is the value of resistance Rs for safe operation of the diode?
- 10 Ω
- 12 Ω
- 13 Ω
- 13.3 Ω
2.
Which of the following statements is not correct in the case of light emitting diodes (LEDs)?
A. It is a heavily doped p-n junction.
B. It emits light only when it is forward-biased.
C. It emits light only when it is reverse-biased.
D. The energy of the light emitted is equal to or slightly less then the energy gap of the semiconductor used.
Choose the correct answer from the options given below:- C and D
- C
- B
- A
3.
In the given circuit, the breakdown voltage of the Zener diode is 3.0 V. What is the value of Iz ?
- 7 mA
- 1.5 mA
- 5.5 mA
- 10 mA
4.
The electrostatic potential due to an electric dipole at a distance \( r \) varies as:- \(\frac{1}{r}\)
- \(\frac{1}{r^3}\)
- \(\frac{1}{r^2}\)
- \(r\)
5.
In the given circuit the input voltage Vin is shown in figure. The cut-in voltage of p–n junction diode (D1 or D2) is 0.6 V. Which of the following output voltage (V0) waveform across the diode is correct?
Fig. 6.
Which of the following circuits would have the diode in conducting state?7.
Find the current through Zener diode if its breakdown voltage is 5 V.
- 58.33 mA
- 25 mA
- 28.33 mA
- 20.23 mA
8.
Match List I with List II:Choose the correct answer from the options given below:List I List II A Intrinsic Semiconductor I Fermi-level near the conduction band B n-type semiconductor II Fermi-level in the middle of valence and conduction band C p-type semiconductor III Fermi-level near the valence band D Metals IV Fermi-level inside the conduction band - A-I, B-II, C-III, D-IV
- A-III, B-I, C-II, D-IV
- A-II, B-I, C-III, D-IV
- A-II, B-III, C-I, D-IV
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