Semiconductor Electronics — Flashcards
ICSE · Class 12 · Physics
32 flashcards for Semiconductor Electronics (ICSE Class 12 Physics) to test yourself on key terms and facts. Part of the ICSE Class 12 Physics syllabus.
Interactive on Super Tutor
Studying Semiconductor Electronics? Get the full interactive chapter.
Quizzes, flashcards, AI doubt-solver and a step-by-step study plan — built for flashcards and more.
Free trial, no card needed.
State the difference between a conductor, an insulator, and a semiconductor on the basis of charge flow.
Answer
Conductor: electric charge can easily flow because there are many free electrons. Insulator: electric charge is difficult to flow because there are practically no free electrons. Semiconductor: conduc…
Why does the resistance of a conductor increase when temperature rises?
Answer
The temperature coefficient of resistance of conductors is positive, so resistance increases with rise in temperature and conductivity decreases. A simple way to remember this is that lattice vibratio…
Why does a semiconductor conduct better at higher temperature?
Answer
The temperature coefficient of resistance of semiconductors is negative, so resistance decreases and conductivity increases with rise in temperature. At higher temperature, more electrons cross the en…
State the definition of an energy band and name the two important bands in a solid.
Answer
An energy band is a group of discrete but closely spaced energy levels in a solid. The two important bands are the valence band and the conduction band.
What is the valence band and what is the conduction band?
Answer
Valence band: the highest energy band occupied by valence electrons. Conduction band: the next higher permitted energy band above the valence band into which electrons can pass and then contribute to …
State the meaning of forbidden energy gap and write its symbol.
Answer
The forbidden energy gap is the energy interval between the top of the valence band and the bottom of the conduction band where electrons cannot have allowed energies. It is denoted by E_g.
Why is sodium a conductor according to band theory?
Answer
A sodium atom has a single valence electron in its outer 3s level. In solid sodium, the 3s band is only half-filled, so electrons can move easily to nearby unoccupied states in the same band without c…
Why is diamond an insulator?
Answer
Diamond has a completely filled valence band and an empty conduction band separated by a gap of 7 eV. At room temperature, kT is only about 0.025 eV, which is far too small to cross the gap. So electr…
+24 more flashcards
Practise AllFrequently Asked Questions
What are the important topics in Semiconductor Electronics for ICSE Class 12 Physics?
How many flashcards are available for Semiconductor Electronics?
How should I revise Semiconductor Electronics for the ICSE Class 12 board exam?
Sources & Official References
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
More resources for Semiconductor Electronics
Practice Quiz
Test yourself with a quick quiz
Important Questions
Exam-style questions with answers
Revision Notes
Key points for last-minute revision
Formula Sheet
The chapter's formulas in one place
Chapter Summary
Understand the chapter at a glance
Concept Maps
See how topics connect
Study Plan
Step-by-step plan for this chapter
Syllabus
What topics to cover
For serious students
Get the full Semiconductor Electronics chapter — start free.
Quizzes, flashcards, an AI doubt solver and a study plan for ICSE Class 12 Physics. Free to start, no card needed.