Answered: FIGURE 20-21 The Hall effect. (a)…

FIGURE 20-21 The Hall effect. (a) Negative charges moving to the right as the current. (b) Positive charg moving to the left as the current. C EH d D (а)

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter22: Magnetism

Section: Chapter Questions

Problem 14CQ: Discuss how the Hall effect could be used to obtain information on free charge density in a...

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Question

(III) A long copper strip 1.8 cm wide and 1.0 mm thick is
placed in a 1.2-T magnetic field as in Fig. 20–21a. When a
steady current of 15 A passes through it, the Hall emf is
measured to be 1.02µV. Determine (a) the drift velocity of
the electrons and (b) the density of free (conducting) electrons (number per unit volume) in the copper.

FIGURE 20-21 The Hall effect.
(a) Negative charges moving to the
right as the current. (b) Positive charg
moving to the left as the current.
C
EH
d
D
(а)

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