JEE Main 2021PhysicsSemiconductorsEasyMCQ

JEE Main 2021 — Semiconductors Question with Solution

JEE Main 2021 (18 Mar Shift 2)

Question

The correct relation between α (ratio of collector current to emitter current) and β (ratio of collector current to base current) of a transistor is :

Choose an option

Show full solutionCorrect option: D
Correct answer
Dα=β1+β

Step-by-step explanation

α=ICIE,β=ICIB

IE=IB+IC

α=ICIB+IC=1IBIC+1

α=11β+1

α=β1+β

Practice this on the real CBT interface

Solve this JEE Main question (and the rest of the Semiconductors chapter) on PrepSharp's TCS iON-style CBT player — with timer, bookmarks and session analytics.

Solve interactively →

About this question

This is a previous-year question from JEE Main 2021, covering the Semiconductors chapter of Physics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.