How to find power in different situations?

In life, sometimes there are situations when there is an urgent need to solve the problem related to how to find power, that is, the amount associated with the categories of work and time. This physical parameter is important because it allows you to define Many meanings. For example, using it, you can easily calculate the time for which the specified amount of work will be performed. It also characterizes, indirectly, of course, the performance of various types of engines. Based on this value, you can also determine, for example, fuel consumption. That is, it is important, both for physics and for the economy. Therefore, the solution of the problem related to how to find power has an important practical and practical significance.

Units

Conditionally, the units of power can be divided into system and non-system. In the first case, it is a watt (W or W) and a series of multiple and lobed units, the designations of which are formed by adding a prefix to the above-mentioned basis. For example, a kilowatt is one thousand watts. At the physical level, this unit characterizes the work that will be done over the time interval. Among the non-system units, the so-called "horsepower" has become most widespread. This is due to the fact that the power of most ICEs is currently measured In these units. The relationship between them is the following - one horsepower is 735 and a half watts. After determining the units in which the physical parameter is measured, we answer the question of how to find power in physics and electronics.

Physics

Power in physics is directly related to one more important parameter - work. Time is the necessary indicator. Essentially, the power can be determined from the work done over a certain period of time. Hence follows the power calculation formula, which looks like this: N = A / t. In the given formula the following designations are accepted: N - power in system units, A - work, measured in joules, t - time in seconds. So, A shows the required amount of work, and N indicates the part of it that needs to be executed from the total volume, in time to make it for a given interval t.

Electrical Engineering

In electrical engineering, unlike physics, everything is much simpler. Both in theory and in practice. Theoretically, the same parameter is determined by the product of specific values of the current and voltage. That is, the formula has the form P = U * I. Here, P is the power in all the same watts. U is the voltage measured in volts, and I is the current in amperes. The formula is universal, that is, the above expression is valid for both direct and alternating current. With its help, you can easily determine the power value for any device. And, in practice, only one device - a multimeter - is enough. First, we determine the voltage by a parallel measurement, and then the current by a sequential measurement. Often this way you can find the answer to the question of how to find engine power. As an alternative, a wattmeter can be used to take readings. But such measuring equipment is very expensive, for this reason it has not yet become widespread. But multimeters have already firmly entered our life and are finding increasing use every day. They also have great versatility, which distinguishes them favorably from other devices that are highly specialized.

Summary

The article helps to find an answer to the question of how to find power in physics and in electrical engineering. From the point of view of practice, in electronics this parameter is much easier to define. But if desired, with the help of modern technology, you can solve the problem of any complexity, in any field.