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Class 12 Physics — Chapter 14: Semiconductor Electronics

90 practice questions · 30 Easy · 30 Medium · 30 Hard

Free NCERT-aligned multiple-choice practice for Class 12 Physics, Chapter 14 (Semiconductor Electronics). Practise timed Easy, Medium and Hard quizzes with instant explanations — built for CBSE Board exams, JEE Main and NEET UG. Here are a few sample questions; sign in free to practise all 90.

Sample questions

Q1Easy

Pure silicon is an example of which type of material?

A.Intrinsic semiconductor✓ correct
B.Conductor
C.Insulator
D.Superconductor
Why

Pure Si has a moderate band gap (~1.1 eV) and is an intrinsic semiconductor.

Q2Medium

A forward-biased pn-junction diode behaves as:

A.A low resistance path✓ correct
B.An open circuit
C.A high resistance path
D.A heating element only
Why

Forward bias narrows depletion region, allowing easy current flow.

Q3Hard

A bipolar junction transistor (BJT) consists of how many terminals?

A.Three (emitter, base, collector)✓ correct
B.Two
C.Four
D.Five
Why

BJT has three regions and two pn-junctions.

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