what is voltage

Voltage is defined as the amount of energy or effort necessary to transport a unit charge from one location to another. Assume we have two points, A and B. We also have 2 C at no cost at point A. Let's assume it takes 2 Jouls of energy to transport a 2 C charge from point A to point B. As a result, the voltage or potential difference between A and B may be calculated as 2J/2C or 1 VoltThe voltage or potential difference is measured in volts.

The letter V stands for it. As a result, the higher the energy required to transfer a charge from one location to another, the greater the potential difference. So, let's suppose 5 C of charge is at point A, and we need 50 J of energy to transport this charge from point A to point B. As a result, the potential difference between the two locations is 50 J/5C = 10 Volts. Let's look at an example to better grasp this idea. Let's pretend there's only one ball on the ground. It also weighs 100 grams. 

Now we want to toss this ball from the bottom to the top of this 10-meter-high skyscraper. As a result, we'll need some energy to complete this assignment. Let's assume we need energy E1 to do this task. In a different scenario, we have a 100-gram ball with the same weight or mass. And we want to toss this ball to the top of a 20-meter-high skyscraper. Let's pretend we need energy from E2. Now, energy E2 will undoubtedly be larger than energy E1 in this situation. Because the second instance has a higher height. As a result, in the second scenario, the quantity of energy required will be higher. As a result, we can make a comparison between this example and the voltage. 

The greater the difference in elevation between the two places, or the higher the building's height, the more energy is required to throw a ball. Similarly, the larger the potential difference between the two places, the more energy is needed to transfer a charge from one point to the other. Let's look at the idea of power in electrical circuits presently. As a result, power may be defined as the rate at which energy in the system is supplied or consumed. As a result, the sign P is used to represent this power. It can also be expressed numerically as E/t. This is the pace at which energy in the system is supplied or consumed. As a result, the unit joule/second is used to define it. Watt, for example. 

Voltage may be represented mathematically as V=E/Q in the preceding example. This is the amount of energy needed to move a single unit charge. The current, or Q/t, may be defined as the rate at which an electrical charge moves away from the reference point. Now, because we're talking about power, P=E/t. So, let's look at a basic example to better grasp the notion of power. Let's suppose point A has one coulomb of charge. This charge has to be moved from point A to point B. And let's suppose the energy necessary for this activity is 5 joules. And, let's suppose, this activity takes 5 seconds to complete. P is determined by the rate at which energy is used, according to the definition of power. That's E/t for you. In this scenario, 1 coulomb of charge takes 5 joules of energy to move. 

This translates to 5 Joules of energy per Colomb. And it will take 5 seconds to transfer this 1 Coulomb charge. That's 1 Coulomb in 5 seconds. As a result, the needed power for this activity is 5J/5 seconds or 1 watt. Let us now broaden the definition of this word. Let's suppose moving Q quantity of charge requires E joules of energy. and the amount of time it will take to complete this task is For Q coulomb of charge, this is t seconds. That is the essence of power. As a result, we may rephrase the equation as (E/Q) * (Q/t). As voltage is defined as the energy necessary to transfer a unit charge, E/Q is nothing more than voltage. In addition, current, in my opinion, can be defined as the rate at which a charge moves. As a result, we can write power as a V*I product. As a result, power may be described as a V*I product. As a result, the connection between voltage, power, and current is extremely helpful. Power is now used or provided in electrical circuits. 

So, in electrical circuits, every element that is either dissipating power or supplying power is either dissipating or supplying power. So, how can you tell whether an element is supplying or dissipating power? The basic sign convention can be used to determine this. As a result, we'll utilize the sign convention to determine if this element is contributing or dissipating energy. Assume we have one element with a voltage of V between the two terminals. We may say that an element is supplying power if current flows out of its positive terminal. Alternatively, if the current flows into the positive terminal of that element, we may argue that it is dissipating power. So, to better grasp it, let's look at an example. Let's pretend we have two voltage sources linked by a single resistor. One power source is 5 volts, while the other is 3 volts. A single resistor, R, connects them. As a result, the current will flow from greater to lower potential, similar to how water flows from higher to lower elevation. As a result, we will have a clockwise current. 

There will be a potential drop across this resistor R due to the current flow. Let's call him Vr. Let's now apply a sign convention to all of the components. As a result, electricity is flowing out of the terminal across the 5-volt source. This indicates that this element or source is delivering electricity. Let's look at a resistor now. As a result, the current flows into the resistor's positive terminal. As a result, the power is dissipated through the resistor. Let's have a look at this 3V voltage source. As a result, electricity enters the positive terminal over 3V. As a result, the 3 V source is likewise wasting energy or power. As a result, 5V is supplying energy while the resistor and 3V voltage source is dissipating it. So, in any network, we can use this sign convention approach to determine which components provide power and which elements dissipate power. So, let's recap everything we've seen so far in this video.

We've learned about current, voltage, and power in electrical circuits, as well as how they're connected. P=V*I is the connection that binds them together. So, now you know what current, voltage, and power in electrical circuits mean. Please let me know if you have any questions or concerns in the comments area below.