42 JEE Main 2021 Semiconductors previous-year questions with verified answers and step-by-step solutions.
These are the JEE Main 2021 previous-year questions from the Semiconductors chapter of Physics. Each links to a full solution with a verified answer key. To see the whole chapter across all years, visit the Semiconductors chapter hub.
The correct relation between α (ratio of collector current to emitter current) and β (ratio of collector curr…
The output of the given combination gates represents:
The value of power dissipated across the zener diode V z = 15   V connected in the circuit as shown in the figure…
For extrinsic semiconductors; when doping level is increased;
Identify the logic operation carried out by the given circuit:
For the given circuit, the power across zener diode is _____ mW .
A 5   V battery is connected across the points X and Y . Assume D 1 and D 2 to be normal silicon diodes. Find the…
The typical output characteristics curve for a transistor working in the common-emitter configuration is shown in the f…
For a transistor α and β are given as α = I C I E and β = I C I B . Then the correct relation betwe…
In the given figure, each diode has a forward bias resistance of 30   Ω and infinite resistance in reverse bi…
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