Electric current (1978)

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Cartoon explaining the nature of electric current in metals.

Experience with the creation of an electric field in metal.

A cartoon explaining the nature of this phenomenon.

Experiments on the occurrence of electric current in electrolytes in comparison with distilled water.

Cartoon explaining the occurrence of current in electrolytes.

By themselves, the molecules of alkalis, salts and acids are neutral, but in water they break up into ions with opposite or equal charges.

Continuation of the cartoon.

The electric current in electrolytes is the directional movement of ions.

Electric tools powered by batteries.

The concept of strong and weak current.

The concept of current strength.

Works carried out with the participation of electric current.

Experiments with light bulbs connected to the city electrical network and to the battery.

As a result of experiments, we get that the magnitude of the electric current depends, as well, on the magnitude of the voltage in the network.

Materials through which electricity is almost not transmitted.

They are called insulators.

Materials that conduct current well are called conductors.

Experience in determining the dependence of the current strength on the voltage at the ends of the conductor and on the properties of the conductor itself.

The formula for calculating the resistance of the conductor.

A cartoon explaining the loss of energy during the passage of current in a conductor.

Experiments to determine the relationship between the current strength, voltage and resistance of the conductor.

Ohm's law.

Alternating frames with the use of electric current in everyday life.

The remote control of the power plant.

Power lines.