The current which flows through the (нить накала лампы накаливания) heats that filament to a high temperature.Ĥ. There are three important effects accompanying the motion of (электрические заряды).ģ. The current flow is (выявляется и измеряется) by any of the effects that it produces.Ģ. Transformation, temperature, chemical, magnetic, special, practical, motor, electrode.ġ. Guess the meaning of the following international words: Give the English equivalents for the following words: 1) выявлять, обнаруживать Any of the above mentioned effects may be used for detecting and measuring current. It may also effect chemical changes in the part of the circuit comprising the liquid and the two electrodes which are found in this liquid. Thanks to it a metal can be transferred from one part of the liquid to another.

The chemical effect is known to occur when an electric current flows through a liquid. The last effect to be considered is the chemical one. The use of such a machine as the electric motor has become possible owing to the electromagnetic effect. An electric charge at rest does not manifest any magnetic effect. This effect exists always whenever an electric current flows, although in many cases it is so weak that one neglects it in dealing with the circuit. A conductor of any kind carrying an electric current, a magnetic field is set up about that conductor. It is the motion of the electric charges that produces the magnetic forces. The electric current can manifest itself in some other way. Owing to it people are provided with a large number of appliances, such as: electric lamps that light our homes, streets and factories, electrical heaters that are widely used to meet industrial requirements, and a hundred and one other necessary and irreplaceable things which have been serving mankind for so many years. The heat developed in the electric circuit is of great practical importance for heating, lighting and other purposes. It is this waste that is generally called 'heat loss' for it serves no useful purposes and decreases efficiency. Heat is greatly desirable at times but at other times it represents a waste of useful energy. On the contrary, the larger the wire is, the more negligible the heat produced is. The thinner the wire is, the greater the developed heat is. The heat produced per second depends both upon the resistance of the conductor and upon the amount of current carried through it. For instance, the current which flows through the filament of an incandescent lamp heats that filament to a high temperature. This effect represents a continual transformation of electric energy into heat. It is detected owing to an increase in the temperature of the circuit. The heating effect of the current is found to occur in the electric circuit itself. The production of heat is perhaps the most familiar among the principal effects of an electric current. There are three important effects accompanying the motion of electric charges: the heating, the magnetic, and chemical effects, the latter is manifested under special conditions. The current flow is detected and measured by any of the effects that it produces.

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