# A person with body resistance between his hands of 1.00 k Ω accidentally grasps the terminals of a 20.0-kV power supply. (Do NOT do this!) (a) Draw a circuit diagram to represent the situation. (b) If the internal resistance of the power supply is 2000 Ω, what is the current through his body? (c) What is the power dissipated in his body? (d) If the power supply is to be made safe by increasing its internal resistance, what should the internal resistance be for the maximum current in this situation to be 1.00 mA or less? (e) Will this modification compromise the effectiveness of the power supply for driving low-re si stance devices? Explain your reasoning,

### College Physics

1st Edition
Paul Peter Urone + 1 other
Publisher: OpenStax College
ISBN: 9781938168000

Chapter
Section

### College Physics

1st Edition
Paul Peter Urone + 1 other
Publisher: OpenStax College
ISBN: 9781938168000
Chapter 21, Problem 26PE
Textbook Problem
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## A person with body resistance between his hands of 1.00 k Ω accidentally grasps the terminals of a 20.0-kV power supply. (Do NOT do this!) (a) Draw a circuit diagram to represent the situation. (b) If the internal resistance of the power supply is 2000 Ω, what is the current through his body? (c) What is the power dissipated in his body? (d) If the power supply is to be made safe by increasing its internal resistance, what should the internal resistance be for the maximum current in this situation to be 1.00 mA or less? (e) Will this modification compromise the effectiveness of the power supply for driving low-re si stance devices? Explain your reasoning,

To determine

(a)

The circuit diagram of a person who accidentally gasps the terminals.

### Explanation of Solution

Given data:

R = 10kΩ

V =20kV

Calculation:

The circuit diagram is as shown below:

To determine

(b)

The current through the body having the internal resistance of 2000Ω.

To determine

(c)

The power dissipated in the body.

To determine

(d)

The internal resistance that should make the power supply to be safe having current of 1MA or less.

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