Physical concepts and devices

When there are problems with turning on any mobile device, be it a smartphone or remote control, first of all change its battery - a battery or battery. But you can make sure that the energy source is working without replacing it. To do this, you just need to know how to check the battery for compliance with its characteristics using a multimeter, and then decide to replace it.

The varistor is used in electronics and is installed to provide protection of devices from voltage surges. Its resistance can vary and depends on the voltage supplied to the device, it varies in the range from 100 MΩ to 10 Ohms. How varistors work, their principle of operation, basic characteristics and parameters - if desired, these issues can be understood by a non-specialist.

In everyday life, situations often arise when it is necessary to measure the voltage in the network or check the wire for breakdown. A voltage tester is used to solve these problems. Modern devices have wide functionality and are called multimeters. However, for a person who is not involved in a professional electrician, a simpler device will suffice.

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Soldering people know that it requires solder and flux. Most of them use rosin and liquid formulations as the second component. Not everyone knows what brazing fat is for, which significantly increases the quality and speed of work.

Not so long ago, modern compact devices came to help motorists instead of a control light. One of the popular models of digital multimeters is DT 832. Instructions for use are included in the kit, you should definitely study them before using. The device operates on batteries, has a small size, and has a low cost.

When renovating or designing a new building, you have to analyze the electrical systems. To do this, you need to be able to work with various measuring quantities, for example, to represent amperes in kilowatts. In the home network, the voltage practically does not change, but you still need to know about the limits of the electric voltage, because it is taken into account when connecting devices of different powers.

The reasons for losses in electrical circuits are the presence in them of inductance and capacities that generate reactive power. In this case, only a part of the total power - the active component - performs useful work. The reactive component is used to create magnetic fields, heat the wiring and increase the load on the network. To prevent losses in networks, reactive power compensators are installed.

Various measuring devices are used to control the parameters of the electrical network. An AC ammeter is a special device that allows you to find out the amperage.

There is a plate on the electric motors, which indicates the main technical characteristics of the unit: power, speed, etc. However, manufacturers do not talk about such a parameter as inrush current. This is an important characteristic that has a significant impact on the performance of the power unit. A good electrician should be able to measure this and know what to do with the values.

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