5th Edition

ISBN: 9780321976444

Author: James S. Walker

Publisher: PEARSON

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Textbook Question

Chapter 20, Problem 90GP

BIO Predict/Calculate Electric Catfish The electric catfish (Malapterurus electricus) is an aggressive fish, 1.0 m in length, found today in tropical Africa. The catfish is capable of generating jolts of electricity up to 350 V by producing a positively charged region of muscle near the head and a negatively charged region near the tail. (a) For the same amount of charge, can the catfish generate a higher voltage by separating the charge from one end of its body to the other, as it does, or from one side of the body to the other? Explain. (b) Estimate the charge generated at each end of a catfish as follows: Treat the catfish as a parallel-plate capacitor with plates of area 1.8 × 10^-2 m², separation 1.0 m, and filled with a dielectric with a dielectric constant ĸ = 95.

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Chapter 20, Problem 89GP

Chapter 20, Problem 91GP

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Chapter 20 Solutions

Physics (5th Edition)

Ch. 20.1 - The electric potential in system A changes...Ch. 20.2 - Particle A accelerates from rest through a...Ch. 20.3 - The following systems consist or a point charge at...Ch. 20.4 - Figure 20-14 shows a series of equipotential...Ch. 20.5 - Two parallel-plate capacitors are identical,...Ch. 20.6 - The following systems consist of a capacitor for...Ch. 20 - In one region of space the electric potential has...Ch. 20 - If the electric field is zero in some region of...Ch. 20 - Sketch the equipotential surface that goes through...Ch. 20 - How much work is required to move a charge from...

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