Semiconductor Quiz – JEE Main 2026 PYQs | NEET JEE Rankers

Semiconductor – JEE Main PYQ Quiz

10 Questions | MCQ + Numerical | Instant Result

Q1. Zener breakdown occurs in a p–n junction which is:

Lightly doped with wide depletion layer Heavily doped with narrow depletion layer Lightly doped with narrow depletion layer Heavily doped with wide depletion layer

Q2. On increasing temperature of a semiconductor:

Electrons decrease, resistance increases Both increase Electrons increase, resistance decreases Both decrease

Q3. A diode has forward drop 0.5 V and max current 10 mA. Battery = 1.5 V. Minimum series resistance is:

50 Ω 200 Ω 100 Ω 300 Ω

Q4. Potential barrier = 0.6 V, depletion width = 6×10⁻⁶ m. Electric field intensity (×10⁵ N/C):

Correct Answer: 1

E = V/d = 0.6 / (6×10⁻⁶) = 1×10⁵ N/C

Q5. Band gap for violet LED (λ = 4000 Å) in eV (nearest integer):

Correct Answer: 3

E = 1240 / 400 ≈ 3.1 eV ≈ 3 eV

Q6. The material used for making LEDs is:

Silicon Germanium Gallium Arsenide Copper

Q7. Logic gate whose output is 1 only when both inputs are 1:

AND OR NAND NOR

Q8. In reverse bias of a diode:

Depletion width decreases Depletion width increases Current increases largely Barrier potential decreases

Q9. A Zener diode is mainly used as:

Rectifier Voltage regulator Amplifier Switch

Q10. Pure silicon at 0 K behaves as:

Conductor Semiconductor Insulator Superconductor

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