NEET PhysicsClass 12Drift of electrons and the origin of resistivityEasySingle correct

A copper wire of uniform cross-sectional area 2.5 mm² carries a steady current of 4.0 A. The number density of free electrons in copper is 8.0 × 10²⁸ m⁻³ and the electronic charge is 1.6 × 10⁻¹⁹ C. What is the drift speed of the free electrons?

More NEET Physics chapters

Laws of Motion · 9 questions
Motion in a Straight Line · 9 questions
Work, Energy and Power · 9 questions
Ray Optics and Optical Instruments · 9 questions

© 2026 Lumi (Aikolumi Software Pvt Ltd). Original questions written by Lumi. Free to view and practise on this site. Copying, republishing or reproducing these questions, options or solutions, in print or online, is not permitted.

A copper wire of uniform cross-sectional area 2.5 mm² carries a steady current of 4.0 A. The number density of free electrons in copper is 8.0 × 10²⁸ m⁻³ and the electronic charge is 1.6 × 10⁻¹⁹ C. What is the drift speed of the free electrons?

More NEET Physics chapters

Practising is step one. Knowing what to practise next is the hard part.