Stack Exchange network consists of 182 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. AFTER FEW DAYS CAN U PLZ SUGGEST ME A INTERVIEW QUESTION ASK IN TECHNICAL ROUND FOR ELECTRICAL ENGINEER. The cookie is used to store the user consent for the cookies in the category "Other. Why Power Factor Decreases When Inductance or Inductive Reactance Increases? In a purely resistive circuit if you double the voltage the current will also double. Frozen core Stability Calculations in G09? resultant values. INSUFFICIENT DATA FOR MEANINGFUL ANSWER To answer this question but it should be V = P/ I. How to cycle through set amount of numbers and loop using geometry nodes? The power will remain the same for a particular load as we are not changing the load. Actually, it depends on how you increase the parameters i.e. Physics Stack Exchange is a question and answer site for active researchers, academics and students of physics. I = P/V). According to the Ohm's Law, I V, But I 1/V in Power According to Ohms Law, Current Increases when Voltage increases (I=V/R), but Current decreases when Voltage increases according to (P = VI) formula. If one point in a circuit is associated with lower (electric) potential energy, then charges want to move there. power has been also increased. Meaning, the closer they are, the more they want to move away. Magnitude of Electric field depends on factors like resistor's length. Is there any particular reason to only include 3 out of the 6 trigonometry functions? Definition, Formula and Calculation. According the power formula, It says that Current is inversely proportional to the voltage if power remain same. The X and Y axes are current Why High Voltage High voltage transmission minimizes the amount of power lost as electricity flows from one location to the next. The lamps will give more light, Towards the aim, Perfect E learn has already carved out a niche for itself in India and GCC countries as an online class provider at reasonable cost, serving hundreds of students. power=dUdt\text{power} = \dfrac{\text dU}{\text dt}power=dtdUstart text, p, o, w, e, r, end text, e What happens to power if voltage is doubled? WisdomAnswer By clicking Post Your Answer, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct. I read the question but it did not find the answers to be satisfying. WebMotor loads and other loads require reactive power to convert the flow of electrons into useful work. Our online courses offer unprecedented opportunities for people who would otherwise have limited access to education. That means when we increase voltage we must also increase the current (I). This is Ohm's law. I do not completely agree, for instance a 10hp motor running on 60% load is fed 415V, it will draw around 9A. WebAdd a comment. Also, can you please give a more technical answer rather than using analogies? The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". Is that correct? Why Power in Pure Inductive and Pure Capacitive Circuit is Zero? These cookies track visitors across websites and collect information to provide customized ads. It that energy is very large at a point, it means that an electron is strongly repelled away from that point. In I = V / R, Current is Directly Proportional to the Voltage, But Current is Inversely Proportional to the Voltage in P = VI? What happens to current and voltage when resistance increases? In this case, temperature is not constant, thats why current decreases. Let's say, 50 Hz. WebAccording to Ohms Law, Current Increases when Voltage increases (I=V/R), but Current decreases when Voltage increases according to (P = VI) formula. @AbdulsattarMohammed Negative charges repel. What happens when the voltage in a circuit increases? The closer they are, the stronger they repel. Will a bulb glow brighter if voltage is increased but current remains the same? It only takes a minute to sign up. I was having the same question and searching for solution. Therefore, if the voltage is increased, the current will increase provided the resistance of the circuit does not change. and if the voltage and the resistance both are doubled, the current will not change. Thanks. How do you I stop my TV from turning off at a time dish? 1. Basic electrical quantities: current, voltage, power - Khan Doubling the voltage gets electrons speed doubled. In TikZ, is there a (convenient) way to draw two arrow heads pointing inward with two vertical bars and whitespace between (see sketch)? The reason is that since the light bulb is far more resistive than anything else in the circuit, the amount of current flowing through the circuit is governed by the behavior of the light bulb, not the wires. The cookie is used to store the user consent for the cookies in the category "Analytics". But transformer increases the current while If Potential difference is doubled then the power increases by 4 units. If resistance and Temperature is constant: Your email address will not be published. If you dont care about the power and just simply replace the battery with a new ones with higher power rating this can increase the current when voltage increase as power is no more constant i.e. Why will they loose energy when they move fast accroding to you? Consider another way of looking at voltage, as a summary of the electric field along a path between two points, $$V_{ab}=-\int_a^b {\bf E}\cdot d{\bf\ell}$$. Is Logistic Regression a classification or prediction model? Since the electric field is stronger, it will exert more force on charge carriers in that area, accelerating them more strongly, and thus increasing the current between the points. Power is P = I V. You can only relate it to resistance if you decided to fix one and replace the other by Ohms law. What happens to power when potential difference is doubled? The current behave differently in coil of the heater and in a normal conductor. 2 What happens to power when potential difference is doubled? Online tuition for regular school students and home schooling children with clear options for high school completion certification from recognized boards is provided with quality content and coaching. 3 What becomes of current I as the voltage V is decreased? can u please explain how to keep power constant in generation side . In a Capacitive Circuit, Why the Current Increases When Frequency Increases? WebIncreasing voltage increases the RPM of the motor, but what does increasing current do? Electron density in a wire remain relatively constant even at high wire temperature. in KSA, UAE, Qatar, Kuwait, Oman and Bahrain. @ TechDroid Let's have a DC circuit of 10-vdc source and a simple load of 10-ohms resulting in a current of 1 amp, i.e, a flow of 6.25E18 electrons per second. But will this hold true also in AC circuits? How does more voltage (greater potential difference) mean more current? When the voltage is increased does the speed of electrons Electric Bill Calculator with Examples, How to Find The Suitable Size of Cable & Wire for Electrical Wiring Installation? You are the first one I find who tells it in a more understandable way. this is true? By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. BUT this translate to the same 10 volts drop in the 1-ohm resistor (instead of 20-v) each time 1-C charges circulates. I was in search of an online course; Perfect e Learn The lower the current, the lower the resistance losses in the conductors. We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. All the courses are of global standards and recognized by competent authorities, thus But if the load is a motor doing work, current will decrease because for the As you say, no, we are not talking about. If the load is resistance the current will increase. Thus, the voltage directly tells us which way charges want to move - and if they can, then they will speed up in that direction, so the current will increase. But opting out of some of these cookies may affect your browsing experience. THANK YOU! Copyright 2023 WisdomAnswer | All rights reserved. If we increase the current, the voltage What happens if both voltage and resistance are doubled? I agree that if power is constant and then if voltage is increased then the current is decreased but if consider the resistance of wire carrying current then by ohms law current should be increased. i.e. Can We Replace a 110/220 Turns Transformer with 10/20 Turns? I How is power related to voltage and resistance? How does increasing voltage or current affect the power? WebAnswer (1 of 7): When Voltage is increased Power Loss is decreased. But current is also inversely proportional to the resistance; a doubling of the resistance will halve the current. Similarly, voltage decreases when current increases in a step-down transformer. The top answer says that electrons that have more energy move faster but why? Why does increasing the voltage across and incandescent bulb increase its temperature? If power at generation side improves, both current and voltage will be increased. Counting Rows where values can be stored in multiple columns. Current is the amount of charge (electrons) passing a point in a wire per unit time. I like this answer, I'd only suggest that it is perhaps clearer to finish, " thus driving an increase in current between the points.". The number of electrons free to flow is a constant for a material. My point is what is the difference between the two conductor. We follow a systematic approach to the process of learning, examining and certifying. Consider another way of looking at voltage, as a summary of the electric field along a path The floor is associated with a lower (gravitational) potential energy than the shelf. WebLosses almost exclusively come from current, higher voltage means less current, so less loss, bigger percentage of voltage arrives at the customer, and only power that arrives These cookies will be stored in your browser only with your consent. Copy. How does it increase the number of coulombs per second (current)? program which is essential for my career growth. Please keep doing good deeds like this. All about Electrical & Electronics Engineering & Technology. My childs preference to complete Grade 12 from Perfect E Learn was almost similar to other children. The electron density does not change because each metal atom has already given up all of its valence electrons; releasing further electrons would require a very large energy input. graduation. I was wrong in thinking the total number of charges in the wire will increase. exams to Degree and Post graduation level. This is what I mean by "electric pressure". current is directly proportional to voltage and inversley proportional to resistance. Current is directly proportional to the voltage in this case. If a nearby point has less potential energy then the charge is repelled less away from that point. tuition and home schooling, secondary and senior secondary level, i.e. How does increasing voltage or current affect the power? Is there a way to use DNS to block access to my domain? Can We Operate a 60Hz Transformer on 50Hz Supply Source and Vice Versa? It only takes a minute to sign up. Thanks!! @AlfredCentauri Can you please elaborate on that or suggest links where I can learn the concept required to understand what are saying.Since I really don't know much about electricity and the whole deal, I don't know what you are talking about. Best Answer. Calculating Voltage Drop for Part of a System Without Current (Resistance and Voltage are Known). This means more electrons, more charges (so more coulomb's), moving from one point to the other per second. Get Free Android App | Download Electrical Technology App Now! Your email address will not be published. What's the meaning (qualifications) of "machine" in GPL's "machine-readable source code"? I HAVE A INTERVIEW IN P&G. If we increase the current, the voltage will decrease for making the power same. Why Power Factor Decreases When Capacitive Reactance Increases or Capacitance Decreases? Reconciling the drift velocity with Joule heating at high and low voltage. 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. By clicking Accept All, you consent to the use of ALL the cookies. @AdityaBharadwaj Aluminum has a higher electron density than copper, so your second question is equivalent to: what happens if we take all of the wires that connect the light bulb to a power source and change them from copper to aluminum? Is there a way to use DNS to block access to my domain? Doesnt moving faster make them lose energy? [duplicate]. 1. But my question is, when voltage increases does an increase in the speed of electrons contribute for an increase in current or does an increase in electron density contribute for it. so if we increase the voltage, the current will decrease to make the net power consumed by the load same as before. 6 How is power related to voltage and resistance? Low Voltage = High Amp The power will remain the same for a particular load as we are not changing the load. You can have a fixed potential difference between two point but it is not true for force. Browse other questions tagged, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site. In short: Voltage represents the electric forces on a charge, which in turn means higher current. hyperphysics.phy-astr.gsu.edu/hbase/electric/miccur.html, Starting the Prompt Design Site: A New Home in our Stack Exchange Neighborhood, Physics.SE remains a site by humans, for humans. This has been the most help I have found on the web, Thank you This cleared everything up. You assume the power of 10 hp in both cases. What are 2 negative effects of using oil on the environment? The cookie is used to store the user consent for the cookies in the category "Performance". This cookie is set by GDPR Cookie Consent plugin. We Rely on Advertising to Help Fund Our Site and Provide Free Information. High Voltage = Low Amp yes I concluded that if power is constant then p=vi holds good , when power varies then ohms law as to be used is it correct. Famous papers published in annotated form? The power dissipated in a resistor is given by P = V2/R which means power decreases if resistance increases. The higher the voltage, the higher the "pressure" that pushes them - so naturally, the higher is their speed, which is what we call current. Voltage - Current Relationship (IV graphs). Why can C not be lexed without resolving identifiers? Latex3 how to use content/value of predefined command in token list/string? Can one be Catholic while believing in the past Catholic Church, but not the present? Pidyon ha-Ben on multiple occasions? What happens to the power loss if the voltage is increased? How do pawn shops deal with stolen goods? Basically, any mass will always want to move towards lowest possible (gravitational) potential energy. Can banks make loans out of their required reserves? Please give an example when and where ohms law is applicable? Lets clear the confusion about the statement. If both double then the power is 4 times greater. The higher the voltage, the lower the current. Given Ohm's law, how can current increase if voltage increases, given fixed resistance? If Voltage = Joules/Coulombs than how can you have Voltage without Current? but now its clear . You also have the option to opt-out of these cookies. Are we missing something? First of all power will alway be same i.e VI (primary side of amplifier) = VI (secondary side of amplifier). However V and I individually can chang voltage - What causes overvoltage in power grid? - Electrical Why does reactive power affect voltage? - Electrical If power ,resistance,temperature are constant .Then it obeys which law?. We also use third-party cookies that help us analyze and understand how you use this website. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. If the electron density increases, the electron speed decreases proportionately. I was already a teacher by profession and I was searching for some B.Ed. For Copper that is one electron per atom. According to Ohms Law, I V, But I 1/V in Power Equation. That is true when feeding a resistor. Required fields are marked *. If we increase voltage, we are increasing energy per coulomb. Thanks!!! Why does increasing voltage result in a decrease in I can't seem to get a straight answer. But, our concern was whether she could join the universities of our preference in abroad. voltage $V$ & electric current $I$ through the conductor (assuming power factor $1$). By your logic, if the voltage source is increased to 20v, the same 1 Coulomb of electrons would circulate but 2x the speed. Thanks a lot. Voltage increases Current flow increases if resistance Does the brightness/power of each individual bulb change when you add more bulbs in a parallel circuit? The 12V system in the car glows a bulb and the same voltage produces heavy torque also through starter. Thats is the exact reason why in Ohms Law, Current is Directly Proportional to the Voltage But Inversely Proportional to the Voltage in Power formula. How do you explain? Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. The same story is there at the generating station where power generation is constant. Why does an increase in drift velocity decrease electron collision? These cookies help provide information on metrics the number of visitors, bounce rate, traffic source, etc. This means if you have two fixed points, and increase the voltage between them, you must be increasing the electric field strength in the region between them. But why? Analytical cookies are used to understand how visitors interact with the website. We have invented the concept of electric potential energy as a measure for this tendency. The best answers are voted up and rise to the top, Not the answer you're looking for? If we increase dimensions of a wire, how does electron density change? 5 How does increasing voltage or current affect the power? Voltage is the amount of energy in joule in every charge of 1 coulomb moving through the wire. In an Inductive Circuit, Why the Current Increases When Frequency Decreases? @Thorondor, The idea (that increasing voltage increases proportionately the speed of conducting electrons) is easily comprehensible in DC circuits. The power will remain the same for a particular load as we are not changing the load. so if we increase the voltage, the current will decrease to m This cookie is set by GDPR Cookie Consent plugin. Overline leads to inconsistent positions of superscript, Beep command with letters for notes (IBM AT + DOS circa 1984). So increasing the voltage increases the speed of the electron flow. Why do incandescent lightbulbs grow dim late in their lives, particularly just before their filaments break? OSPF Advertise only loopback not transit VLAN. "The amount of coulomb" doesn't make sense (it's like saying "the amount of metre") . And when resistance losses are low, energy losses are low also. This website uses cookies to improve your experience while you navigate through the website. If the current in a circuit decreases the power dissipated by that circuit will .. i need help, If current decreases the power dissipated in circuit is decreases ,because power loss is I Squire R ,thats why we are using high voltage transmission line for power transmission line .P=VI. 4 Why does increasing voltage decrease power loss? Will a bulb glow brighter if voltage is increased but current remains the same? Awesome explanation. Why does increasing voltage increase current? [duplicate] Spaced paragraphs vs indented paragraphs in academic textbooks. Learn more about Stack Overflow the company, and our products. Ohm's Law and Power Flashcards | Quizlet How is the executive branch leader chosen? This is another confusing question mostly asked in, According to Ohms Law: I V (Current directly proportional to the Voltage. It does not store any personal data. This is another confusing question mostly asked in electrical and electronics engineering interviews as is follow. This cookie is set by GDPR Cookie Consent plugin. Connect and share knowledge within a single location that is structured and easy to search. In a conductive material such as a metal, for all practical purposes, current depends only on the speed of the electrons. I prompt an AI into generating something; who created it: me, the AI, or the AI's author? compare the Voltage withe the pressure difference on a water pipe, if you increase the pressure, the water flows faster. Why does increasing voltage increase current? Beep command with letters for notes (IBM AT + DOS circa 1984). This implies that the 6.25E18 electrons gets Was the phrase "The world is yours" used as an actual Pan American advertisement? Does their values changes if so what will be their estimated or Digital Forensics. A difference in (electric) potential energy thus means that there is a tendency for charges to move. Copy. WebAnswer (1 of 4): The word voltage is meaningless, and should be replaced with voltage difference. So yes, Current decreases when voltage decreases and vice versa i.e. In case of transformer, when voltage increases then current decrease because power remains constant i.e. In an insulator or semiconductor, the density of charge carriers may increase during electrical breakdown. What happens if voltage increases? - Answers power is constant. Nice and simple explanation. Making statements based on opinion; back them up with references or personal experience. Why does the voltage drop in a cell increase if a heavy current is drawn from a cell? When resistance increases what happens to power? By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet. When there is not enough reactive power, the voltage sags down and it is Why can C not be lexed without resolving identifiers? in the text there you have : V = P/V 1 What happens to power if voltage is doubled? Follow, Copyright 2023, All Rights Reserved 2012-2023 by, Looks Like You're Using an Ad Blocker.
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