JEE Main 2020PhysicsDual Nature of MatterMediumMCQ

JEE Main 2020 — Dual Nature of Matter Question with Solution

JEE Main 2020 (04 Sep Shift 1)

Question

Given figure shows few data points in a photo-electric effect experiment for a certain metal. The minimum energy for ejection of electrons from its surface is: (Planck's constant h=6.62×10–34 J.s)

 

Choose an option

Show full solutionCorrect option: A
Correct answer
A2.27 eV

Step-by-step explanation

Threshold Energy =hv

=6.62×10−34×5.5×1014 J

Work friction =6.62×5.5×10−201.6×10−19eV

=2.27 eV 

Practice this on the real CBT interface

Solve this JEE Main question (and the rest of the Dual Nature of Matter 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 2020, covering the Dual Nature of Matter 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.