Electricians, electronics engineers and people of other related professions are well aware of the concept of soldering and a tool for these purposes - a soldering iron. Its device also does not cause much bewilderment, since it is built on elementary concepts. But the induction soldering iron is not known to everyone. Not even every electrician can explain the principle of its operation. Although the operation of such a device is based on the most ordinary laws of physics.
DIYers prefer devices that combine several metrological functions. These include multimeters - devices that allow you to determine the characteristics of an electrical circuit (resistance, current and voltage). All these functions are specified in the DT 830B manual, an inexpensive instrument that measures with a high level of accuracy.
The operation of electrical networks must be safe, therefore various protection devices are used to achieve this. One of the important such devices is the 1-phase voltage monitoring relay. Its main task is to protect household equipment from the negative effects of overvoltage in the mains. Moreover, such a device does not take up much space, and its installation does not cause any particular difficulties.
In the modern world, at work and at home, people are surrounded by electrical appliances. However, in the absence of mains voltage or damage to the wiring, they become useless. To find the cause of the malfunction, a voltage indicator is used. This device is also used to check the condition of electrical networks and equipment before starting repair and installation work.
Alternating and direct currents differ from one another in many parameters, and especially in the presence of phases in the first type. These differences are associated with more complex formulas and methods for calculating the numerical values of the quantities characterizing the alternating current, including the power of the three-phase current.
When performing major repairs, people are faced with the problem of calculating the number of lumens per square meter. This calculation is necessary to create good lighting in the room. An experienced person can immediately imagine the required number of lamps, their power, the type and amount of luminous flux they give, roughly estimating the area of the room. Lumen is a measure of light output.
A multimeter (tester, avometer) is a combined measuring device for determining current strength, voltage, resistance and other indicators necessary when working with electricity. How much a multimeter costs depends on its functionality. Even the simplest device with a minimum set of options is suitable for household needs, which are quite sufficient for to find out if the lithium-ion battery is working, and if the wire from the microwave ovens.
In everyday life, as a rule, phrases such as power consumption or simply electrical power are used. The question of how much electricity a particular device consumes is always relevant. But in physics, the concept of AC power is interpreted somewhat broader.
The electric field is a constituent part of the electromagnetic field. It appears around charged bodies and particles. This object is invisible, but the determination of the electric field can be made by placing a certain charge in it. To establish a quantitative value, there is the concept of tension. This is a vector quantity and shows with what force the field acts on the test charge placed in it.
