22. As a person moves about in a dry environment, electric charge accumulates on the person's body. Once it is at high voltage, either positive or negative the body can discharge via sparks and shocks. Consider a human body isolated from ground, with the typical capacitance 150 pF. A) What charge on the body will produce a potential of 10.0 kV? B) Sensitive electronic devices can be destroyed by electrostatic discharge from a person. A particular device can be destroyed by a discharge releasing energy of 250 µJ. To what voltage on the body does the situation correspond?

22. As a person moves about in a dry environment, electric charge accumulates on the person's body. Once it is at high voltage, either positive or negative the body can discharge via sparks and shocks. Consider a human body isolated from ground, with the typical capacitance 150 pF. A) What charge on the body will produce a potential of 10.0 kV? B) Sensitive electronic devices can be destroyed by electrostatic discharge from a person. A particular device can be destroyed by a discharge releasing energy of 250 µJ. To what voltage on the body does the situation correspond?

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter19: Electric Potential And Electric Field

Section: Chapter Questions

Problem 67PE: A nervous physicist worries that the two metal shelves of his wood frame bookcase might obtain a...

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An air-filled (empty) parallel-plate capacitor is made from two square plates that are 25 cm on each side and 1.0 mm apart. The capacitor is connected to a 50-V battery and fully charged. It is then disconnected from the battery and its plates are pulled apart to a separation of 2.00 mm. (a) What is the capacitance of this new capacitor? (b) What is the charge on each plate? (c) What is the electrical field between the plates?
A nervous physicist worries that the two metal shelves of his wood frame bookcase might obtain a high voltage if charged by static electricity, perhaps produced by friction. (a) What is the capacitance of the empty shelves if they have area 1.00102 m2 and are 0.200 m apart? (b) What is the voltage between them it opposite charges of magnitude 2.00 nC are placed on them? (C) To show that this voltage poses a small hazard, calculate the energy stored.
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