2025 source guide · Physics

NEET 2025 Physics Semiconductor Electronics Questions

Use this page to connect the official 2025 paper with current Physics practice. NeetVellum does not claim a chapter appeared in that paper until the official question and final key have been mapped.

Practice 120 verified questions →Check official NTA archive ↗

What to master

junction diodes, rectification, logic gates and elementary devices.

Original practice preview

These are current-syllabus NeetVellum questions, shown separately from historical-paper provenance.

Example 1 · difficulty 2/5

A very small concentration of suitable impurity can greatly increase a semiconductor's conductivity mainly because it

A. creates many additional majority carriers without requiring a large change in crystal composition
B. forces all lattice ions to drift
C. eliminates the valence band
D. turns each covalent bond into a metallic bond

Example 2 · difficulty 3/5

In an intrinsic semiconductor, electron and hole concentrations are equal. If electron mobility is three times hole mobility, which statement is correct?

A. Hole conductivity contribution is three times the electron contribution
B. Electron conductivity contribution is three times the hole contribution
C. The two contributions are equal because carrier concentrations are equal
D. Hole contribution is zero

Example 3 · difficulty 3/5

A semiconductor has n = 5 × 10²⁰ m⁻³, p = 1 × 10²⁰ m⁻³, μₑ = 0.10 m² V⁻¹ s⁻¹ and μₕ = 0.05 m² V⁻¹ s⁻¹. For an electric field of 20 V m⁻¹, take e = 1.6 × 10⁻¹⁹ C. What is the current density?

A. 17.6 A m⁻²
B. 160 A m⁻²
C. 176 A m⁻²
D. 352 A m⁻²

The evidence-first practice loop

1. Verify provenanceOfficial paper and final key before accepting a PYQ label.
2. Attempt closed-bookExpose the concept or execution gap before rereading.
3. Repair and returnClassify the miss and re-practice after a delay.

Canonical chapter practice

Semiconductor Electronics →

Frequently asked questions

Are these official NEET 2025 Physics Semiconductor Electronics PYQs?

No. The previews are original NeetVellum practice questions. A historical item receives a PYQ label only after its official paper and authoritative final answer key are attached. Use the official archive for the source paper.

How should I use the NEET 2025 paper?

Solve the official paper under its original timing, verify against the final key, classify every miss, and then use the linked current-syllabus practice bank to repair the exposed concept.