A length of copper track on a printed circuit board has a cross-sectional area of 5.0

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A length of copper track on a printed circuit board has a cross-sectional area of 5.0 × 10⁻⁸ m². The current in the track is 3.5 mA. You are provided with some useful information about copper:

1 m³ of copper has a mass of 8.9 × 10³ kg

54 kg of copper contains 6.0 × 10²⁶ atoms

In copper, there is roughly one electron liberated from each copper atom.

a. Show that the electron number density n for copper is about 10²⁹ m⁻³.

b. Calculate the mean drift velocity of the electrons.

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Cambridge International AS And A Level Physics Coursebook

ISBN: 9781108859035

3rd Edition

Authors: David Sang, Graham Jones, Gurinder Chadha, Richard Woodside

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Question Posted: Sep 24, 2021 02:22 AM

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A length of copper track on a printed circuit board has a cross-sectional area of 5.0

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Given Crosssection Area A of copper 50 x 108 m I 35 mA 00035 A As per data given a 54kg atom c...View the full answer

Cambridge International AS And A Level Physics Coursebook

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