If we have two charges that are both positively charged, the repel each other, i.e. The equipments used for current and voltage measurement are also mentioned. Save my name, email, and website in this browser for the next time I comment. We don't have any banner, Flash, animation, obnoxious sound, or popup ad. It is important to know the fundamentals of voltage and current for electrical and electronic engineering and all those related to the electricity. It’s only when a charge moves with time that we can refer to it as current. When water is being spread the flow is the current. So, if an electron is caused to move in an atomic system, it carries with it “charge” entities of -1.6 x10⁻¹⁹C. If connected in series a voltage gets disturbed and cannot perform better and when connected parallel, it can perform in a much better position. It should be noted also that current is charge in motion. But we know that current is carried by electrons which are negatively charged. One volt is the difference of electric positional equal to one ampere of current dissipates one watt of. Current is the rate of charge flow between two points caused by voltage. But, bear in mind that electrons flow from the negative end to the positive end of the battery. Now, if you put a unit positive charge +Q in-between the negative charge denoted with –q and the positive charge denoted with +q, from the fact we established earlier, the unit positive charge +Q will be attracted to the –q and repelled by the +q. In fact it is considered the 0-V (zero volts) reference point or ground point. It is the effect of voltage which makes voltage the cause of current. they would not want to come much closer to each other. But when J.J Thompson discovered that it was electrons that do the work in electronic circuits and they are not positively charged, the science community still continued with Benjamin Franklin’s convention, so, we call this virtual current “conventional current”. If it took 2 seconds for the 10 charges to pass over to side B, it means that the number of charges that passed in 1 second will be 5. How do we arrive at this? Volt – Also known as Voltage or simply “V”. Voltage is same at each point in parallel connection i.e. We denote the value of current with a unit called Ampere, amp in short or just A. To have a clear understanding, it would be necessary to discuss both ideal and practical versions of voltage source and current source. Electrons which surround atoms carry charges as they move in their quantised states outside the nucleus of an atom. In contrast to a practical voltage source, an imaginary deal source provide constant voltage regardless of load current because of no internal resistance. 1 electron charge is equal to -1.6 x10⁻¹⁹C. DC Current: A DC (Direct Current) has the constant magnitude which doesn’t change its polarity or direction throughout the time. Alternating Voltage changes its polarity and magnitude while it is remain constant in DC. Without a current voltage can still occur. Our website is made possible by displaying online advertisements to our visitors. Current cannot occur without voltage. This page compares current measurement vs voltage measurement and mentions difference between current measurement and voltage measurement. The unit of Voltage is Volt, which is abbreviated as V. When +Q was in-between –q and +q, it had greater force influence which made it to move to meet –q. From the diagram above, it looks like current is carried by positive charges moving from the positive end of the battery (shown in red colour) to the negative end (shown in black colour).

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