QUESTION 5The density of free electrons in gold is 5.9 ×1028 m¯³. If a gold wire with diameter d= 5.0 mm carriesa current of 2.3 A, find the drift velocity (in µm/s) of the electrons in the wire.QUESTION 6A toaster having a Nichrome heating element of initial resistance Ro is switched on at T= 20 °C. Thetemperature coefficient of Nichrome is 4.5×10¯“ °C¯' amd the operational temperature of the toaster'sheating element is 220 °C. The toaster is rated at 0.71 kW at 240 V. Calculate the initial resistance Ro(in 2) of the heating element.

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The density of free electrons in gold is 5.9 ×10-8 m¯³. If a gold wire with diameter d= 5.0 mm carries a current of 2.3 A, find the drift velocity (in um/s) of the electrons in the wire.

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter9: Current And Resistance

Section: Chapter Questions

Problem 81CP: A 10-gauge copper wire has a cross-sectional area A=5.26mm2 and carries a current of I=5.00A . The...

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Microscopic view of current

In physics, the term current is expressed as the rate of flow of electric charges across the area per unit time (I=q/t). It propagates along in the direction of the motion of positive charges. When the current is caused by the motion of electrons, the direction of the current is opposite to the flow.

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