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Electricity and inventions. In this video we will learn about two types of electric

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currents and we will learn about electrical safety. Types of electric current. Using

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electrical energy. Some technologies that use electrical energy were invented at the end of

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the 19th century. We have the direct current and the alternating current.

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Thomas Alva Edison invented the direct current. The current moves in the same

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direction through power lines. Nikola Tesla invented the alternating current.

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the direction of the current changes periodically. Electrical safety.

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Electricity can be very dangerous, so we need to use it carefully. Here are some

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things that you should not do. Do not use electrical appliances in the bath or

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shower. Do not plug in an appliance with wet hands. So you have to be careful when

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you have water near a plug or an electrical appliance. Do not open or

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repair a plugged appliance. You have to unplug the appliance before you try to

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to open or repair it. Do not clean a plugged appliance with a damp cloth. All right, so make

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sure that you are very careful with appliances, with electrical appliances. Okay, until next time, goodbye!