Verified Solution • 2025–26 Session moderate

QJEEM23Phc165: JEE Main 2023 Physics - Class 12 JEEM23Phc165 Solution: The drift velocity of electrons for a conductor connected in an …

The drift velocity of electrons for a conductor connected in an electrical circuit is Vd. The conductor in now replaced by another conductor with same material and same length but double the area of cross section. The applied voltage remains same. The new drift velocity of electrons will be

Multiple Choice Options

  • A Vd4
  • B Vd
  • C 2 Vd
  • D Vd2

Step-by-Step Verified Solution

Drift velocity of electron, Vd=−eEτmV_d=\frac{-e E \tau}{m}

As E=VlE=\frac{V}{l}

We can write, Vd=−eVτmlV_d=\frac{-e V\tau}{m l}

where, l=l= length of conductor,

VV is applied voltage

As drift velocity does not depends upon area, so it will remain same, even after changing area of conductor.

Related Learning Resources & Exam Preparation

JEE Main PYQ Question Bank
Browse year-wise authentic previous years' questions with solutions
Authentic CBT Mock Tests
Simulate official exam environment with live timer and percentile scoring