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A small region of an impure silicon crystal with dimensions 1.25 × 10-6 m ×10-3 m ×10-3 m has only the ions (with charge +1.6 10-19 C) present with a volume density of 10²5/m³. The rest of the crystal volume contains equal densities of electrons (with charge -1.6 × 10¬19 C) and positive ions. Find the net total charge of the crystal.

A small region of an impure silicon crystal with dimensions 1.25 × 10-6 m ×10-3 m ×10-3 m has only the ions (with charge +1.6 10-19 C) present with a volume density of 10²5/m³. The rest of the crystal volume contains equal densities of electrons (with charge -1.6 × 10¬19 C) and positive ions. Find the net total charge of the crystal.

Delmar's Standard Textbook Of Electricity
Delmar's Standard Textbook Of Electricity
7th Edition
ISBN:9781337900348
Author:Stephen L. Herman
Publisher:Stephen L. Herman
Chapter1: Atomic Structure
Section: Chapter Questions
Problem 6RQ: How many valence electrons are generally contained in materials used for insulators?
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(a) A small region of an impure silicon crystal with dimensions 1.25 × 10-6 m ×10-3 x10-3 m has only the ions (with charge +1.6 10-19 C) present with a volume density of 1025/m³. The rest of the crystal volume contains equal densities of electrons (with charge -1.6 x 10-19 C) and positive ions. Find the net total charge of the crystal.
Transcribed Image Text:(a) A small region of an impure silicon crystal with dimensions 1.25 × 10-6 m ×10-3 x10-3 m has only the ions (with charge +1.6 10-19 C) present with a volume density of 1025/m³. The rest of the crystal volume contains equal densities of electrons (with charge -1.6 x 10-19 C) and positive ions. Find the net total charge of the crystal.
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