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Semiconductor Diode and Diode Circuits for JEE: 37 solved questions

Real JEE paper questions on semiconductor diode and diode circuits, part of semiconductor electronics. Each opens with the options, the correct answer and a step-by-step solution. Papers run from 2006 to 2026. No sign-in needed to read them.

What this topic asks

• Circuits with diodes — 26 questions
• Biasing and I-V characteristics — 11 questions

All 37 questions with solutions

• Consider a circuit consisting of a capacitor (20 μF), resistor (100 Ω) and two identical diodes as shown in f… JEE Main 4th April 1st Shift 2026
• Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R. Asserti… JEE Main 4th April 2nd Shift 2026
• The charge stored by the capacitor C in the given circuit in the steady state is μC. [Figure: a left rail and… JEE Main 21st Jan 2nd Shift 2026
• Assuming in forward bias condition there is a voltage drop of 0.7 V across a silicon diode, the current throu… JEE Main 28th Jan 1st Shift 2026
• Which of the following circuits represents a forward biased diode? [Figure: five circuits, each a diode betwe… JEE Main 22nd Jan 1st Shift 2025
• Refer to the circuit diagram given in the figure. Which of the following observations are correct? A. Total r… JEE Main 23rd Jan 1st Shift 2025
• What is the current through the battery in the circuit shown below? [Figure: two parallel branches, each an i… JEE Main 23rd Jan 2nd Shift 2025
• The value of net resistance of the network as shown in the given figure is [Figure: three parallel branches b… JEE Main 4th April 1st Shift 2024
• Which of the diode circuit shows correct biasing used for the measurement of dynamic resistance of p-n juncti… JEE Main 4th April 2nd Shift 2024
• Which of the following circuits is reverse-biased? [Figure: (a) +2 V, diode pointing right, resistor, +4 V. (… JEE Main 27th Jan 1st Shift 2024
• In the given circuit, the voltage across load resistance (R_L) is [Figure: a 15 V cell in series with a germa… JEE Main 30th Jan 2nd Shift 2024
• If each diode has a forward bias resistance of 25 Ω in the below circuit, which of the following option is co… JEE Main 10th April 2nd Shift 2023
• In the given circuit, the current (I) through the battery will be [Figure: a 10 V battery on the bottom side,… JEE Main 15th April 1st Shift 2023
• The I-V characteristics of a p-n junction diode in forward bias is shown in the figure. The ratio of dynamic… JEE Main 26th June 1st Shift 2022
• For using a multimeter to identify diode from electrical component, choose the correct statement out of the f… JEE Main 28th June 1st Shift 2022
• In the given figure, each diode has a forward bias resistance of 30 Ω and infinite resistance in reverse bias… JEE Main 1st Sept 2nd Shift 2021
• A 5 V battery is connected across the points X and Y. Assume D₁ and D₂ to be normal silicon diodes. Find the… JEE Main 25th Feb 1st Shift 2021
• When a diode is forward biased, it has a voltage drop of 0.5 V. The safe limit of current through the diode i… JEE Main 3rd Sept 1st Shift 2020
• In the figure, potential difference between A and B is [Figure: a 30 V cell (positive at top) in series with… JEE Main 7th Jan 2nd Shift 2020
• The current i in the network is [Figure: a diamond network. Left vertex L, top vertex T, bottom vertex M, rig… JEE Main 9th Jan 2nd Shift 2020
• Two identical capacitors A and B, charged to the same potential 5 V are connected in two different circuits a… JEE Main 9th Jan 2nd Shift 2020
• Ge and Si diodes start conducting at 0.3 V and 0.7 V respectively. In the following figure if Ge diode connec… JEE Main 9th Jan 2nd Shift 2019
• The circuit shown below contains two ideal diodes, each with a forward resistance of 50 Ω. If the battery vol… JEE Main 11th Jan 2nd Shift 2019
• The reading of the ammeter for a silicon diode in the given circuit is [Figure: a 3 V cell, a silicon diode (… JEE Main 2018
• The V-I characteristic of a diode is shown in the figure. The ratio of forward to reverse bias resistance is… JEE Main Online 2017
• A 2 V battery is connected across AB as shown in the figure. The value of the current supplied by the battery… JEE Main Online 2015
• The current voltage relation of diode is given by I=(e^1000V/T-1) mA, where the applied voltage V is in volts… JEE Main 2014
• The forward biased diode connection is [Figure: each option is a diode pointing right followed by a resistor.… JEE Main 2014
• Figure shows a circuit in which three identical diodes are used. Each diode has forward resistance of 20 Ω an… JEE Main Online 2013
• The circuit has two oppositely connected ideal diodes in parallel. What is the current flowing in the circuit… JEE Main 2006
• In the following, which one of the diodes is reverse biased? [Figure: (a) ground, then a diode pointing right… JEE Main 2006
• As per the given circuit, the value of current through the battery will be A. [Figure: a 10 V battery on the… JEE Main 26th June 1st Shift 2022
• The cut-off voltage of the diode (shown in figure) in forward bias is 0.6 V. The current through the resistor… JEE Main 27th June 2nd Shift 2022
• For the forward biased diode characteristics shown in the figure, the dynamic resistance at I_D=3 mA will be… JEE Main 20th July 2nd Shift 2021
• The circuit contains two diodes each with a forward resistance of 50 Ω and with infinite reverse resistance.… JEE Main 26th Feb 1st Shift 2021
• Both the diodes used in the circuit shown are assumed to be ideal and have negligible resistance when these a… JEE Main 9th Jan 1st Shift 2020
• The output voltage in the following circuit is (Consider ideal diode case) [Figure: a resistor from +5 V pull… JEE Main 8th April 2nd Shift 2025