Thanks for explanation. So when motor is not running on full load capacity it will draw less current. 3 What becomes of current I as the voltage V is decreased? What are 2 negative effects of using oil on the environment? How to inform a co-worker about a lacking technical skill without sounding condescending. Lets clear the confusion about the statement. Same is the case for charge and (electric) potential energy. OSPF Advertise only loopback not transit VLAN. We also use third-party cookies that help us analyze and understand how you use this website. Why does increasing the voltage across and incandescent bulb increase its temperature? in the text there you have : V = P/V 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. Our Degree programs are offered by UGC approved Indian universities and recognized by competent authorities, thus successful learners are eligible for higher studies in regular mode and attempting PSC/UPSC exams. Calculator, How to Calculate the Battery Charging Time & Battery Charging Current Example, How To Calculate Your Electricity Bill. It only takes a minute to sign up. Does it randomly increase? Is there any advantage to a longer term CD that has a lower interest rate than a shorter term CD? Why is there inconsistency about integral numbers of protons in NMR in the Clayden: Organic Chemistry 2nd ed.? Thanks a lot. We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. Given Ohm's law, how can current increase if voltage increases, given fixed resistance? Why Power Factor Decreases When Capacitive Reactance Increases or Capacitance Decreases? Perfect E Learn is committed to impart quality education through online mode of learning the future of education across the globe in an international perspective. Current is directly proportional to the voltage in this case. The cookie is used to store the user consent for the cookies in the category "Other. Explain? THANKS to the one who explained this article . @Thorondor, The idea (that increasing voltage increases proportionately the speed of conducting electrons) is easily comprehensible in DC circuits. In TikZ, is there a (convenient) way to draw two arrow heads pointing inward with two vertical bars and whitespace between (see sketch)? Why can C not be lexed without resolving identifiers? Is there a way to use DNS to block access to my domain? helped me to continue my class without quitting job. Does their values changes if so what will be their estimated or Why will they loose energy when they move fast accroding to you? Ohm's Law states. The lower the current, the lower the resistance losses in the conductors. WebAnswer (1 of 7): When Voltage is increased Power Loss is decreased. Is it Possible to Operate a 50Hz Transformer on 5Hz or 500Hz Frequency? How to calculate power when we are applying ohms law? Calculating Voltage Drop for Part of a System Without Current (Resistance and Voltage are Known). Current is the amount of charge (electrons) passing a point in a wire per unit time. but now its clear . In short: Voltage represents the electric forces on a charge, which in turn means higher current. Can We Replace a 110/220 Turns Transformer with 10/20 Turns? It does not store any personal data. As you say, no, we are not talking about. My point is what is the difference between the two conductor. Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. This is what I mean by "electric pressure". You are the first one I find who tells it in a more understandable way. Beep command with letters for notes (IBM AT + DOS circa 1984). Because when Voltage is increased Current is decreased ultimately Power loss is decreased. U have explained it in a very simple way. have discontinued my MBA as I got a sudden job opportunity after Copy. If we increase the current, the voltage Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet. Increase in current translates to increase in speed of electrons moving past our reference point. Intuitively, the answer should be "nothing changes." Also "voltage" doesn't "move through the wire". If Potential difference is doubled then the power increases by 4 units. The best answers are voted up and rise to the top, Not the answer you're looking for? 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. Why is a Transformer Rated in kVA, but Not in kW? Blessing or not? compare the Voltage withe the pressure difference on a water pipe, if you increase the pressure, the water flows faster. but it should be V = P/ I. Physics Stack Exchange is a question and answer site for active researchers, academics and students of physics. 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 As we already know that in a step-up transformer, if voltage increases, the current decreases where power is same (as transformer only step-up or step-down the value of current and voltage and doesnt change the value of power). What becomes of current I as the voltage V is increased? Electron density in a wire remain relatively constant even at high wire temperature. In case of P = VI, When P is constant, then correct. But will this hold true also in AC circuits? In case of transformer, when voltage increases then current decrease because power remains constant i.e. 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. Overline leads to inconsistent positions of superscript, Beep command with letters for notes (IBM AT + DOS circa 1984). @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? That means when we increase voltage we must also increase the current (I). THANKS! This potential energy difference is called, @AbdulsattarMohammed A larger voltage means a larger net force. 1 What happens to power if voltage is doubled? Connect and share knowledge within a single location that is structured and easy to search. I am just a high school student trying to self study, please excuse me if this question sounds silly to you. If the electron density increases, the electron speed decreases proportionately. the 10/12 Board Is that correct? Counting Rows where values can be stored in multiple columns. This occurs in avalanche diodes, neon lights, lightning bolts, and elsewhere. Physics Stack Exchange is a question and answer site for active researchers, academics and students of physics. I read the question but it did not find the answers to be satisfying. The right way to think is that charges move faster. If the load is resistance the current will increase. and if the voltage and the resistance both are doubled, the current will not change. For Copper that is one electron per atom. Why does increasing voltage decrease power loss? What becomes of current I as the voltage V is decreased? Thanks for contributing an answer to Physics Stack Exchange! What happens to a current if the voltage increases? This means more electrons, more charges (so more coulomb's), moving from one point to the other per second. Similarly, voltage decreases when current increases in a step-down transformer. P = 1.732 x V x I x Cos (in three phase circuit) This is another confusing question mostly asked in electrical and electronics engineering interviews as is follow. Does the brightness/power of each individual bulb change when you add more bulbs in a parallel circuit? 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. But opting out of some of these cookies may affect your browsing experience. Performance cookies are used to understand and analyze the key performance indexes of the website which helps in delivering a better user experience for the visitors. Copyright 2023 WisdomAnswer | All rights reserved. If you increase length you get weaker electric field amd hence weaker force on each charge particle. Required fields are marked *. What happens if both voltage and resistance are doubled? Therefore if the voltage suppose if power varies in generation side then what happens,will current increases with increase in voltage.Please explain Im waiting for your reply. I like this answer, I'd only suggest that it is perhaps clearer to finish, " thus driving an increase in current between the points.". By your logic, if the voltage source is increased to 20v, the same 1 Coulomb of electrons would circulate but 2x the speed. What happens to power when potential difference is doubled? This has been the most help I have found on the web, Thank you This cleared everything up. Power(P) = Voltage(V) * Current(I) That law describes the relationship between power, voltage, and current in a conductor . It means that, if you Step by Step Procedure with Solved Example. develop their business skills and accelerate their career program. Notify me of follow-up comments by email. These cookies ensure basic functionalities and security features of the website, anonymously. When you lift the voltage V that goes to a circuit, also the flowing amperage A will go up and so does the power. Keep up the good work ? How is the executive branch leader chosen? resultant values. INSUFFICIENT DATA FOR MEANINGFUL ANSWER To answer this question power=dUdt\text{power} = \dfrac{\text dU}{\text dt}power=dtdUstart text, p, o, w, e, r, end text, e How is power related to voltage and resistance? The higher the voltage, the higher the "pressure" that pushes them - so naturally, the higher is their speed, which is what we call current. Thank you, Everyone else in the entire Internet is trying to define current and voltage with a water analogy (just leading to more questions, like definition of "pressure"). By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. A difference in (electric) potential energy thus means that there is a tendency for charges to move. The cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. Why does photocurrent increase with voltage for a while? can u please explain how to keep power constant in generation side . You can have a fixed potential difference between two point but it is not true for force. Lets explain why. We all know that a ball wants to fall down from a shelf. How do pawn shops deal with stolen goods? What happens to power if voltage is doubled? If the power of the source is constant then the current would decrease when voltage increases. This is for explanation purpose only in ideal case, where the input power at generation side is equal to the the receiving end power (consider zero% losses).. the best example is Electrical Transformer where power is remain constant while current or voltage may step up or step down which depends on the transformer primary and Secondary winding design and positions. @GuyInchbald, how is what you say different from what was said in the answer? So yes, Current decreases when voltage decreases and vice versa i.e. Is there any particular reason to only include 3 out of the 6 trigonometry functions? I do not completely agree, for instance a 10hp motor running on 60% load is fed 415V, it will draw around 9A. So increasing the voltage increases the speed of the electron flow. How does increasing voltage or current affect the power? Related question:Say the electron density of a circuit that lights a light bulb increases.When this happens what change will we see in the brightness of the light bulb?I know that when the speed of electrons increase the brightness increases but what will happen when the electron density increases? Can the supreme court decision to abolish affirmative action be reversed at any time? Ohms law is applicable at constant temperature.. current and voltage are directly proportional at constant temperature but for variable temperature p= vi .. current and voltage are inverse is that correct admin.. waiting for reply.. Dear Sir can u please Explain which Type of Thyristors and Capacitors are used in Induction melting furnace? I had same question and was searching for its solution. P = VI Cos (in single phase Ac Circuit) We follow a systematic approach to the process of learning, examining and certifying. How does increasing the potential energy make an electron move faster? program which is essential for my career growth. If we increase dimensions of a wire, how does electron density change? If it isn't that black and white, then in what proportion will each of the two components increase? Inew = 6 mA (Current is directly proportional to voltage; a halving of the voltage will halve the current. power has been also increased. In most circuits, voltage does not change regardless of the change in resistance. .. it is as meaningless as saying this mountain is 5000 ft. .. without adding the Is there a way to use DNS to block access to my domain? this is true? The same story is there at the generating station where power generation is constant. Current= voltage divided by Resistance.. rev2023.6.29.43520. "A voltage between two points thus means a net force from one point to the other" that's not so correct! Use MathJax to format equations. That is true when feeding a resistor. How could submarines be put underneath very thick glaciers with (relatively) low technology? 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. How AlphaDev improved sorting algorithms? When resistance increases what happens to power? Why do incandescent lightbulbs grow dim late in their lives, particularly just before their filaments break? All about Electrical & Electronics Engineering & Technology. Do spelling changes count as translations for citations when using different english dialects? Digital Forensics. If we increase voltage, we are increasing energy per coulomb. I was having the same question and searching for solution. This cookie is set by GDPR Cookie Consent plugin. recommend Perfect E Learn for any busy professional looking to tuition and home schooling, secondary and senior secondary level, i.e. Can banks make loans out of their required reserves? The closer they are, the stronger they repel. What do you do with graduate students who don't want to work, sit around talk all day, and are negative such that others don't want to be there? Thanks!!! Nice and simple explanation. Is it appropriate to ask for an hourly compensation for take-home interview tasks which exceed a certain time limit? 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. Why does the voltage drop in a cell increase if a heavy current is drawn from a cell? AFTER FEW DAYS CAN U PLZ SUGGEST ME A INTERVIEW QUESTION ASK IN TECHNICAL ROUND FOR ELECTRICAL ENGINEER. graduation. Therefore, if the voltage is increased, the current will increase provided the resistance of the circuit does not change. This cookie is set by GDPR Cookie Consent plugin. @ 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. The current behave differently in coil of the heater and in a normal conductor. And when resistance losses are low, energy losses are low also. I strongly The difference in electric potential energy (per charge) between two points is what we have given the name voltage. How to Size a Single Phase and Three Phase Transformer in kVA? If we increase the current, the voltage will decrease for making the power same. in KSA, UAE, Qatar, Kuwait, Oman and Bahrain. Was the phrase "The world is yours" used as an actual Pan American advertisement? Electric Bill Calculator with Examples, How to Find The Suitable Size of Cable & Wire for Electrical Wiring Installation? Thanks. Magnitude of Electric field depends on factors like resistor's length. In a purely resistive circuit if you double the voltage the current will also double. Will a bulb glow brighter if voltage is increased but current remains the same? i.e. What's the meaning (qualifications) of "machine" in GPL's "machine-readable source code"? Does the debt snowball outperform avalanche if you put the freed cash flow towards debt? Also, can you please give a more technical answer rather than using analogies? document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Enter Your Email Address to Subscribe to this Blog and Receive Notifications of New Posts by Email. test, which makes it an ideal choice for Indians residing As we already know that in a step-up transformer, if voltage increases, the current decreases where power is same (as transformer only step-up or step-down the value of current and voltage and doesnt change the value of power). exams to Degree and Post graduation level. When there is not enough reactive power, the voltage sags down and it is Get Free Android App | Download Electrical Technology App Now! Please give an example when and where ohms law is applicable? Are we missing something? if you increase the voltage by keeping the power of the source constant or is it varying. Got it. current is directly proportional to voltage and inversley proportional to resistance. How do you explain? Your email address will not be published. Reconciling the drift velocity with Joule heating at high and low voltage. You also have the option to opt-out of these cookies. If a nearby point has less potential energy then the charge is repelled less away from that point. But would this not translate to current frequency of 100 Hz (bcoz the electrons would now traverse the same area -- say it's a load of 1 ohm resistor -- twice per unit of time) while maintaining 50 Hz for voltage? How does more voltage (greater potential difference) mean more current? Think of voltage as an "electric pressure" on the charges. If we increase voltage, we are increasing energy per coulomb. That flow is defined in electrons per second past a point. I HAD FIGURED THAT OUT A FEW YEARS AGO BUT IN STUDYING ALL THE HIGHER LEVEL STUFF FORGOT THE BASICS! However, you may visit "Cookie Settings" to provide a controlled consent. You assume the power of 10 hp in both cases. I was wrong in thinking the total number of charges in the wire will increase.