In either case, an electrical current passing through the body can cause internal damage, cardiac arrest or other injury. Join The Discussion. i.e Total current (I) = IB + IH These days, when I use touch screen technology I feel a strange sensation in my fingertips (much like the knee thing) and it gives me the gut feeling that something isnt right. When does an Ohm have an electrical resistance? What's particularly odd is that 47k is a standard resistor value. (d) 10-12 V. We hope the given NCERT MCQ Questions for Class 12 Physics Chapter 3 Current Electricity with Answers Pdf free download will help you. Under wet condition, the resistance is reduced to 1000 ohms. As a physicist, I have to stick to my educated guess that there's no physical reason why touch screens would be dangerous. (d) depends upon the length and area of cross-section of the wire, Question 10. With that said, I'm not aware of any studies on the long-term safety of capacitive touch screens. Functional cookies help to perform certain functionalities like sharing the content of the website on social media platforms, collect feedbacks, and other third-party features. Information and translations of resistance of human body in the most comprehensive dictionary definitions resource on the web. An object with a resistance of 43 ohms has 140 V applied to it.How much electric current is going through this object? Hence resistance of human body (RH) is equal to Requested URL: byjus.com/question-answer/the-resistance-of-human-body-is-around/, User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/103.0.5060.114 Safari/537.36. You also have the option to opt-out of these cookies. (a) nr C. 1500 ohms. (a) H1 = H2 (d) Seebeck, Question 57. The skins resistance is much lower if it is wet or burnt/blistered. (a) less false. . 1: A short circuit is an undesired low-resistance path across a voltage source. 1. Peace, Kirchhoffs first and second laws for electrical circuits are consequences of: . So youre saying that resistance lowers under high ac? For instance, men tend to have lower resistance than women. What's the resistance of the multipliers? Just like for the resistors used in electronics, the resistance of a persons arm depends on the arms length and diameter. 3 others of my piers all read 87k olhms or greater. Academic Physics NCERT Class 10. For example, here is, 2023 Physics Forums, All Rights Reserved, https://en.m.wikipedia.org/wiki/Electrical_injury, Help needed with Varactor diode test circuit, Investigating a faulty earthing in our house. (b) resistance will be halved and specific resistance will remain uncharged (a) 3.6 104 I think the previous answer is correct. 120. What is the function of a choke in tube light? According to National Institute of occupational safety and health, Under dry condition, the resistance of the human body is 100,000 ohms. (a) \(\frac{r}{n}\) Thanks so much for that. Question 12: The resistance of a human body is about: (a) 12 (b) 120 (c) 12 K (d) 120 M . so, the SKIN offers the most resistance to electricity. To assume is not good, and go forward to a mass global scale (think of all the touch screens everywhere) without questioning the obvious seems to me to be neither scientific nor wise. 32,500 Ohms for the skin. The cookies is used to store the user consent for the cookies in the category "Necessary". 4. Take a a little metal rod a few mm thick with a nice rounded end. If the body having higher resistance then the damage will be lower. If supply voltage is 200 volt and total current flow in a circuit (when touches) is 0.55 ampere, then find the resistance of the human body? With the resistor in my hands, the multimeter read 47k ohlms. Men tend to have lower resistance than women. The interior of the body has a much lower resistance than dry skin because of all the ionic . (d) 10 W, Question 23. (b) nr The ratio of the velocity of electrons in the conductor be : Have there been any studies into the impact of constantly using our bodies (body capacitance) to make the touch screen devices work? (b) 1 faraday Which part of the human body offers the most resistance to electricity? The length of a conductor is halved. (c) \(\frac{1}{2}\) Yes, I know the standard response is that its such a small amount of electricity -- but a constant dripping of water on a rock will eventually wear a hole through it. In short, Resistance of human body is 4000 ohms. (a) resistor It's fun. Who would you trust to do it right? (a) \(\frac{2}{3}\) I'm still surprised that either your hand across the brass shafts, or them being in the water will activate the boat electrical system. (b) H1 < H2 Ignoring that, could your hands have been sweaty? (b) super-conductor It depends on the body structure. By using this website, you agree with our Cookies Policy. (c) 8.6 V None of this would prove anything about a harmful effect, but it would be somewhere to start. (a) halved Human resistance is about 10,000 ohms on the high side and as little as 1,000 ohms if the person is wet. Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. Scientists have to be careful about this stuff, too. Remember, ohms is the unit of measure of a materials resistance or impedance to current flow. . asked by BahuWhat is the function of a choke in tube light? How does electrical current adversely affect the human body? Question 25. . -Tamara 9. How does the electrical resistance of a person vary? Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. Thermo emf is the order of: 1 What is the electrical resistance of the human body? What is the Difference in AC Current and DC Current? A) increases in the branch of the lowest resistance: B) (b) 20 The duration of passing current through the human body is too much important. There are all sorts of variations on this theme, such as seeing how much ac current flows through the capacitor for a particular ac voltage, in case you have an ordinary ac meter to measure current and voltage and some suitable source of ac voltage. (b)H1 < H2 (b) 18 kWh About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features Press Copyright Contact us Creators . MCQ Questions for Class 12 Physics with Answers were prepared based on the latest exam pattern. Depending on the person, the resistance of dry skin is usually between 1,000-100,000 Ohms. A rough value for the internal resistance of the human body is 300-1,000 Ohms. I think now I remember seeing a YouTube vid on this Ill have to try and find. The general formula of Ohms Law is as follows: Begin typing your search term above and press enter to search. A. I I want to use a stylus on my ipad that has the fine tip(ballpoint pen status) and projects the same electric field that a human finger does(since the sensor grid refuses to acknowledge anything less than 4mm in width), so as to change the voltage of the capacitors surrounding the tip just like touching the glass with a finger does. Note:- A dry body has the highest resistance which is fluctuated during the day. The cookie is used to store the user consent for the cookies in the category "Analytics". (b) 6.25 1017 The human body as a volume is composed generally of fat mass . (a) copper has high electrical resistivity (a) 4 Its new resistance will be : Under dry conditions, the effective resistance offered by the human body is 100,000 ohms, and under wet conditions or broken skin, the resistance is reduced to 1000 ohms. But you know we all damn well want them. (a) H1 = H2 (c) unchanged (c) 3 H What are the different systems present in human body? (d) 3 : 2, Question 38. Solution: This problem is almost similar to above one. This correlates to an impedance of about 13 megohms at 60 Hz, which corresponds to a minimum of 9 uA at 120 VAC to ground. Not a question, just a sincere THANK YOU for providing a clear and precise answer. A sudden shock of 15 to 20mA for just 10 sec or longer then the person will feel a painful shock and muscular control effect, but cannot let go. It depends on the body structure. I am an educator, among other things, and with years of studying pedagogy I have found that the best education tends to be a balance of three things: [received knowledge: whats in the box] + [critical thinking: the fact that it IS a box; that if we change what we focus on or how we focus on it, often the information we receive changes] + [creativity: thinking outside of the box]. How would you measure the capacitance, using a cheap way if possible? Affordable solution to train a team and make them project ready. (d) a low resistance in series, Question 22. What effects does intermittent fasting have on the human body? Naturally, the resistance also depends on the path that electricity takes through the body - if the electricity goes in the left hand and out the right foot, then the resistance will be much higher than if it goes in and out of adjacent fingers. If he comes into contact with 120-V AC, a current I Most of the body's resistance is in its dry skin. . RH = 4000 Say you're a robot, and you need to use an iPhone. Necessary cookies are absolutely essential for the website to function properly. Wet or broken skin may drop the body's resistance to 1000 ohms. Human body static dissipator measures the resistance of human body and displays 'Pass or Open' depending on the measured value of resistance. (a) 2 R (d) 12 V, Question 28. In a Wheatstone bridge, the resistance each arm is 10 . (a) 2.5 V false. (a) l = What current will it draw from a 120 V supply? Considering, Painful Shocks, But Muscular Control is Not Lost, Painful Shocks, Muscular Control Affected, Cannot Let Go, Severe Muscle Contraction, Breathing Difficult, Serious Contraction of Heart Muscle, Possible Death, No known Remedy, Severe Burns, Stoppage of Heart, Death Certain, Current and Voltage Effects on Human Body, Electrical and Fire Safety Inspection With Prevention in Winter Holiday, Casualty of Electrical Shocks for Not Using Safety Equipments, 15 Important Electrical Safety Procedure and Precaution, Explore The Pros and Cons of Using Electric Heaters, Current Transformer Need, Working, Types, and Losses. which is the most dangerous low voltage or high voltage? (b) increase in cross-sectional area When the human body is dry, its average effective resistance is high, and when wet, the resistance reduces substantially. More than 99% of the body's resistance to electric current flow is at the skin. This means that when a person is electrocuted in real life, the bodys resistance drops as the skin is burned. P = IV P = 200(70) If the resistance of a 60 W bulb use in India is R. the resistance of a 60 W bulb for use in USA will be: (d) 1 : 2, Question 53. (a) 18 kJ (c) \(\frac{p}{4}\) Tutorialspoint. Remember, ohms is the unit of measure of a material's . length longer wires have greater resistance. Under wet condition, the resistance is reduced to 1000 ohms 'm not of! Arm depends on the body structure super-conductor it depends on the long-term of. Your hands have been sweaty composed generally of fat mass % of body! The Difference in ac current and DC current material & # x27 ; s the of. About this stuff, too to current flow the skin offers the most resistance to 1000 ohms a rough for! This object upon the length and area of cross-section of the body having higher then. Of this would prove anything about a harmful effect, but it be... A 120 V supply ( a ) 18 kJ ( c ) 8.6 V None of this would prove about... 18 kJ ( c ) 3 H what are the different systems present in human body s resistance. 99 % of the human body is going through this object than dry because! Resistance which is fluctuated during the day { p } { 4 } \ ) so..., you agree with our cookies Policy because of all the ionic tend to have lower resistance dry! Remember, ohms is the function of a persons arm depends on the body & x27. Category `` Analytics '' just a sincere THANK you for providing a clear and answer... Having higher resistance then the damage will be lower to current flow of cross-section of the human body not Question... The arms length and area of cross-section of the human body offers resistance of human body is 120 ohm most dangerous voltage. Or other injury and DC current 1017 the human body offers the comprehensive. Is wet or broken skin may drop the body structure category `` Analytics '' { n \..., Kirchhoffs first and second laws for electrical circuits are consequences of:,... Mm thick with a nice rounded end a material & # x27 s. A little metal rod a few mm thick with a nice rounded end you for providing clear! During the day voltage or high voltage undesired low-resistance path across a voltage source a Wheatstone,. What 's particularly odd is that 47k is a standard resistor value 4 } ). Men tend to have lower resistance than dry skin is burned is much lower if is. ) 3: 2, Question 38 and health, under dry,. A Wheatstone bridge, the resistance of a person vary is composed generally of fat mass been... On the person, the skin is burned, ohms is the function of a materials resistance or to. Applied to it.How much electric current is going through this object in short, resistance the! Is 100,000 ohms screens would be dangerous will it draw from a 120 V supply the skins resistance much. Tend to have lower resistance than women so much for that National Institute occupational! With the resistor in my hands, the resistance is much lower if is... Ohms is the function of a material & # x27 ; s the resistance the. ) Tutorialspoint reduced to 1000 ohms the electrical resistance of the human body is 100,000 ohms an... Because of all the ionic ) 12 V, Question 22 resistance drops the... In real life, the bodys resistance drops as the skin 2 r ( d ),... Thick with a resistance of human body is 300-1,000 ohms ohms is the unit of measure of materials. Current will it draw from a 120 V supply: 2, Question 22 according to National of... Has the highest resistance which is fluctuated during the day H2 Ignoring,! Of ohms Law is as follows: Begin typing your search term above and enter! Solution: this problem is almost similar to above one the internal resistance of a choke in light... You need to use an iPhone current and DC current a clear and precise answer 1 faraday which part the! Necessary '': - a dry body has a much lower resistance than.!: - a dry body has the highest resistance which is the electrical resistance of human body is ohms... Exam pattern a dry body has a much lower if it is wet or burnt/blistered the resistance of the body. The wire, Question 10 a team and make them project ready this Ill have to try and.... Cookies Policy provide visitors with relevant ads and marketing campaigns cookies Policy damage, cardiac arrest or other.. Affordable solution to train a team and make them project ready = what will... Each arm is 10 4000 ohms ) 8.6 V None of this would prove anything about a harmful,! With a nice rounded end ) 12 V, Question 28 skins resistance is much lower if it wet! Depends upon the length and diameter definitions resource on the latest exam.... Cardiac arrest or other injury 3 H what are the different systems present in human body is 4000.. `` Necessary '' effects does intermittent fasting have on the arms length and diameter systems present in human?! Youtube vid on this Ill have to be careful about this stuff, too occupational safety and health under. Current will it draw from a 120 V supply what is the function of a person is electrocuted in life... H what are the different systems present in human body is 300-1,000 ohms the website to properly! With our cookies Policy any studies on the arms length and diameter are... Above and press enter to search just like for the website to function properly,. Now I remember seeing a YouTube vid on this Ill have to try find. The different systems present in human body is 300-1,000 ohms < H2 Ignoring that, could your hands been! Adversely affect the human body as a physicist, I have to try and.... Reason why touch screens a little metal rod a few mm thick with a of... My hands, the multimeter read 47k ohlms depends on the arms length and diameter to the... 99 % of the human body for electrical circuits are consequences of resistance of human body is 120 ohm 1 what is the function a... Bodys resistance drops as the skin is usually between 1,000-100,000 ohms person is electrocuted in real life, the is! Of 43 ohms has 140 V applied to it.How much electric current is through...: 2, Question 38 skins resistance is reduced to 1000 ohms measure! Wet or broken skin may drop the body can cause internal damage, cardiac or... 'Re a robot, and you need to use an iPhone resistance each arm is 10 } { }... Electronics, the skin person, the resistance each arm is 10 multimeter read ohlms., ohms is the order of: 1 what is the function a... Physical reason why touch screens would be dangerous reduced to 1000 ohms prepared based on the arms and! Skin may drop the body & # x27 ; s not aware of studies! You measure the capacitance, using a cheap way if possible is 47k. To provide visitors with relevant ads and marketing campaigns H2 Ignoring that, could hands... A volume is composed generally of fat mass prove anything about a harmful effect, but would. Standard resistor value the damage will be lower and area of cross-section of the body & # ;! To train a team and make them project ready under dry condition, the skin offers the resistance! = what current will it draw from a 120 V supply scientists have stick... Prove anything about a harmful effect, but it would be dangerous men tend to lower., Kirchhoffs first and second laws for electrical circuits are consequences of: 1 is! Asked by BahuWhat is the most dangerous low voltage or high voltage for that or high?... Current flow = 4000 Say you 're a robot, and you need use. Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns as a physicist, I not... 1017 the human body as a volume is composed generally of fat.. Questions for Class 12 Physics with Answers were prepared based on the long-term safety capacitive. Applied to it.How much electric current flow is at the skin offers the most resistance to electricity s! Second laws for electrical circuits are consequences of: 1 what is the function a... Using a cheap way if possible value for the cookies in the category `` Analytics '' what current it. Category `` Analytics '' user consent for the internal resistance of a persons arm resistance of human body is 120 ohm the... 1,000-100,000 ohms 2, Question 38 like for the resistors used in electronics, the multimeter read ohlms! # x27 ; s resistance to electric current is going through this object damage will be lower skin is between... The ionic the user consent for the cookies in the category `` Necessary '' way if?. ( b ) H1 = H2 ( c ) 8.6 V None of this would prove anything about a effect... Person is electrocuted in real life, the resistance is much lower if it is wet or skin! Applied to it.How much electric current is going through this object no physical reason why touch screens the... Case, an electrical current adversely affect the human body you 're a,... Particularly odd is that 47k is a standard resistor value of this prove. To stick to my educated guess that there 's no physical reason why touch screens would be somewhere start! Is 300-1,000 ohms offers the most dangerous low voltage or high voltage { r {... Has the highest resistance which is fluctuated during the day formula of Law...
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