Notes of Waves & Types of Waves

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Notes of Waves & Types of Waves























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Why does Ukraine matter?

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Electricity

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 Electricity Current electricity is one of the important energy for the mankind. In our daily life we need it for different aspects. To avoid darkness at night we use electric lamps. To operate radio, T.V, telephone, computer or other electric appliances, we need current electricity. Similarly electric heater, electric iron, electric motor, etc depend on current electricity. Electricity is essential to run the factories, and various industries. Source of electricity Equipments which generate current electricity are said to be the electric sources. Electricity can be obtained by different means. Some of them are discussed below.  1. Cell  2. Photo cell  3. Dynamo and generators  1. Cell: By some specific chemical reaction current electricity is produced in the cells. For example, we have dry cells or simple cells. We get current electricity by the chemical reaction inside them. Dry cells are generally used to operate the tourch light, small transistors...
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