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Let's measure your body resistance. Set the Multimeter to measure resistance, indicate the units. Ask for help if you don't know how. Measure and record your body resistance between the following points of contacts: From right hand to left hand: 13 M From hand to foot: _ The actual resistance of your body will vary depending upon the points of contact and, as you have discovered, the conditions of your skin. Also, notice how the resistance varies as you squeeze the probes more or less tightly. Resistance could vary widely from 25002 for wet skin to 500,000 for dry skin. According to Table 1, possible heart fibrillation may occur after 3 seconds if exposed to relatively small amount of de or ac currents. Using Ohm's Law, determine the potentially fatal voltages for your measured body resistance. Record results in Table 2. Indicate the units. Table 2- Voltage Levels That May Cause Heart Fibrillation DC Voltage (I = 0.5A) Points of Contacts Hand-to-Hand (Dry) Hand-to-Foot (Dry) 452 60 Hz, AC Voltage (I= 0.1A) 500 mA. 1.3 1/300000003 200,0

Let's measure your body resistance. Set the Multimeter to measure resistance, indicate the units. Ask for help if you don't know how. Measure and record your body resistance between the following points of contacts: From right hand to left hand: 13 M From hand to foot: _ The actual resistance of your body will vary depending upon the points of contact and, as you have discovered, the conditions of your skin. Also, notice how the resistance varies as you squeeze the probes more or less tightly. Resistance could vary widely from 25002 for wet skin to 500,000 for dry skin. According to Table 1, possible heart fibrillation may occur after 3 seconds if exposed to relatively small amount of de or ac currents. Using Ohm's Law, determine the potentially fatal voltages for your measured body resistance. Record results in Table 2. Indicate the units. Table 2- Voltage Levels That May Cause Heart Fibrillation DC Voltage (I = 0.5A) Points of Contacts Hand-to-Hand (Dry) Hand-to-Foot (Dry) 452 60 Hz, AC Voltage (I= 0.1A) 500 mA. 1.3 1/300000003 200,0

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
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Using table 1, complete table 2.
TR Let's measure your body resistance. Set the Multimeter to measure resistance, indicate the units. Ask for help if you don't know how. Measure and record your body resistance between the following points of contacts: From right hand to left hand: 13 M From hand to foot: M The actual resistance of your body will vary depending upon the points of contact and, as you have discovered, the conditions of your skin. Also, notice how the resistance varies as you squeeze the probes more or less tightly. Resistance could vary widely from 2500 for wet skin to 500,000 for dry skin. According to Table 1, possible heart fibrillation may occur after 3 seconds if exposed to relatively small amount of de or ac currents. Using Ohm's Law, determine the potentially fatal voltages for your measured body resistance. Record results in Table 2. Indicate the units. Table 2- Voltage Levels That May Cause Heart Fibrillation DC Voltage (I = 0.5A) Points of Contacts Hand-to-Hand (Dry) Hand-to-Foot (Dry) 4520 DO NOT TRY TO PROVE IT! 60 Hz, AC Voltage (I = 0.1A) 500 mA. 1.3 M 1.005 11/3000-00 100,000 Question. Goggle on the internet and find what is the typical voltage that an AED Defibrillator applies to a person that suffers sudden cardiac arrest. An AED delivers an instantaneous voltage of:
Transcribed Image Text:TR Let's measure your body resistance. Set the Multimeter to measure resistance, indicate the units. Ask for help if you don't know how. Measure and record your body resistance between the following points of contacts: From right hand to left hand: 13 M From hand to foot: M The actual resistance of your body will vary depending upon the points of contact and, as you have discovered, the conditions of your skin. Also, notice how the resistance varies as you squeeze the probes more or less tightly. Resistance could vary widely from 2500 for wet skin to 500,000 for dry skin. According to Table 1, possible heart fibrillation may occur after 3 seconds if exposed to relatively small amount of de or ac currents. Using Ohm's Law, determine the potentially fatal voltages for your measured body resistance. Record results in Table 2. Indicate the units. Table 2- Voltage Levels That May Cause Heart Fibrillation DC Voltage (I = 0.5A) Points of Contacts Hand-to-Hand (Dry) Hand-to-Foot (Dry) 4520 DO NOT TRY TO PROVE IT! 60 Hz, AC Voltage (I = 0.1A) 500 mA. 1.3 M 1.005 11/3000-00 100,000 Question. Goggle on the internet and find what is the typical voltage that an AED Defibrillator applies to a person that suffers sudden cardiac arrest. An AED delivers an instantaneous voltage of:
have larger capacitance values that ceramic, mica, polymer capacitors. Capacitors subjected to high Capacitors are polarized components, and typical these type of capacitors currents may cause heating and explosion. Table 1- Physiological Effects Caused by Electric Currents BODILY EFFECT Slight sensation felt at hand(s) Threshold of perception Painful, but voluntary muscle control maintained Painful, unable to let go of wires Severe pain, difficulty breathing Possible heart fibrillation after 3 seconds BURNS 10 mon DC CURRENT (mA) Menoidea Women Men Women Men Women Men Women Men Women Men Women 1.0 0.6 avoid burns: 5.2 3.5 62 41 76 51 90 60 500 500 Source: Electrical Safety, Volume I -DC, All About Circuits at: https://www.allaboutcircuits.com/textbook/direct-current/chpt-3/ohms-law-again/ AC CURRENT 60 Hz (mA) 0.4 0.3 1.1 0.7 9 6 16 10.5 23 15 100 100 The dissipation of electric energy produces heat that may cause burns on contacts. AC CURRENT 10 kHz (mA) 7 5 12 8 55 37 75 50 94 63
Transcribed Image Text:have larger capacitance values that ceramic, mica, polymer capacitors. Capacitors subjected to high Capacitors are polarized components, and typical these type of capacitors currents may cause heating and explosion. Table 1- Physiological Effects Caused by Electric Currents BODILY EFFECT Slight sensation felt at hand(s) Threshold of perception Painful, but voluntary muscle control maintained Painful, unable to let go of wires Severe pain, difficulty breathing Possible heart fibrillation after 3 seconds BURNS 10 mon DC CURRENT (mA) Menoidea Women Men Women Men Women Men Women Men Women Men Women 1.0 0.6 avoid burns: 5.2 3.5 62 41 76 51 90 60 500 500 Source: Electrical Safety, Volume I -DC, All About Circuits at: https://www.allaboutcircuits.com/textbook/direct-current/chpt-3/ohms-law-again/ AC CURRENT 60 Hz (mA) 0.4 0.3 1.1 0.7 9 6 16 10.5 23 15 100 100 The dissipation of electric energy produces heat that may cause burns on contacts. AC CURRENT 10 kHz (mA) 7 5 12 8 55 37 75 50 94 63
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