---
title: "A flat conducting ribbon of width \\(2.0 \\text{ cm}\\) carries a constant current in a uniform magnetic field of magnitude \\(0.50 \\text{ T}\\) directed perpendicular to the surface of the ribbon. Due to the magnetic force on the charge carriers, a potential difference (Hall voltage) of \\(4.0 \\text{ }\\mu\\text{V}\\) is established across the width of the ribbon. What is the magnitude of the drift velocity of the charge carriers in the ribbon?"
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url: "https://nerd-notes.com/ubq/118537/"
date_modified: "2026-08-04T08:11:15+00:00"
---

# A flat conducting ribbon of width \(2.0 \text{ cm}\) carries a constant current in a uniform magnetic field of magnitude \(0.50 \text{ T}\) directed perpendicular to the surface of the ribbon. Due to the magnetic force on the charge carriers, a potential difference (Hall voltage) of \(4.0 \text{ }\mu\text{V}\) is established across the width of the ribbon. What is the magnitude of the drift velocity of the charge carriers in the ribbon?

A flat conducting ribbon of width \(2.0 \text{ cm}\) carries a constant current in a uniform magnetic field of magnitude \(0.50 \text{ T}\) directed perpendicular to the surface of the ribbon. Due to the magnetic force on the charge carriers, a potential difference (Hall voltage) of \(4.0 \text{ }\mu\text{V}\) is established across the width of the ribbon. What is the magnitude of the drift velocity of the charge carriers in the ribbon?

![A perspective view of a flat rectangular conducting slab lying horizontally in the xy-plane. The slab has width w along the y-axis, length along the x-axis, and thickness t along the z-axis. A uniform magnetic field vector B points vertically upward along the positive z-axis, represented by three parallel vertical arrows pointing upward labeled \vec{B}. An electric current I flows along the positive x-axis, represented by a horizontal arrow along the length labeled I. Two probe contacts are placed on opposite side edges along the width w, with a voltmeter symbol labeled V_H connected between them across the width. No other labels, lines, text, or axes appear.](https://nerd-notes.com/wp-content/uploads/ubq-frq-generated/stem-fig-1-1785831074-IJXIrC.jpg)

- **A.** \(1.0 \times 10^{-5} \text{ m/s}\)
- **B.** \(4.0 \times 10^{-5} \text{ m/s}\)
- **C.** \(1.0 \times 10^{-4} \text{ m/s}\)
- **D.** \(4.0 \times 10^{-4} \text{ m/s}\)

*The answer key and step-by-step explanation are available to logged-in users at https://nerd-notes.com/ubq/118537/*