Skip to main content
Super TutorResources
Chapter 31 of 32
Formula Sheet

Junction Transistors — Formula Sheet

ICSE · Class 12 · Physics

7 formulas from Junction Transistors (ICSE Class 12 Physics) on one page, grouped by topic. Part of the ICSE Class 12 Physics syllabus.

53 questions35 flashcards7 formulas & key relations5 concepts

Interactive on Super Tutor

Studying Junction Transistors? Get the full interactive chapter.

Quizzes, flashcards, AI doubt-solver and a step-by-step study plan — built for formula sheet and more.

Try Super Tutor — Free

Free trial, no card needed.

7 Entries · 2 Sections

Formulas and Key Relations

3. Transistor Currents and Gains

I_E = I_B + I_C

alpha(DC) = I_C / I_E

beta(DC) = I_C / I_B

beta(AC) = (Delta I_C) / (Delta I_B) at constant V_CE

alpha = beta / (1 + beta)

4. Common-Emitter Characteristics

R_in = (Delta V_BE / Delta I_B)_(V_CE)

R_out = (Delta V_CE / Delta I_C)_(I_B)

Full sheet with units and worked examples

View All

Frequently Asked Questions

What are the important topics in Junction Transistors for ICSE Class 12 Physics?
Key topics in Junction Transistors include Basic idea of a junction transistor, Types of transistors and symbol directions, Transistor action and current relation, Current gain and related parameters. Study these first, then practise questions on each for the ICSE Class 12 board exam.
How many formulas are in Junction Transistors?
This sheet lists 7 formulas from Junction Transistors, grouped by topic. Learn what each symbol stands for so you can apply the formula, not just recall it.
How should I revise Junction Transistors for the ICSE Class 12 board exam?
Learn the core ideas first, then work through the 53 practice questions on Junction Transistors. Revise definitions regularly and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

More resources for Junction Transistors

All ICSE Class 12 Physics Formula Sheet

For serious students

Get the full Junction Transistors chapter — start free.

Quizzes, flashcards, an AI doubt solver and a study plan for ICSE Class 12 Physics. Free to start, no card needed.

Try Super Tutor Free
Try this chapter free