ساينس الصف الخامس الإبتدئي الفصل الدراسي الاول ساينس خامسة ابتدائي – ترم أول In This part we will study : 2. The electric effect of the magnet • In the 19th century, the English scientist Faraday discovered that when a magnet is moved inside a coil of wire, an electric current passes through the coil. • Faraday used that to make the dynamo “electric generator”. The dynamo (electric generator): 1. The structure: 1. A copper coil. 2. A magnet. 2. Its function: • It converts the mechanical (kinetic) energy into electric energy. 3. Idea of work: • By moving the coil in the magnetic field (or moving the magnet inside the coil) the electric current is generated in the coil. Increasing the produced amount of electricity from the dynamo by: a. Using a strong magnet. b. Or increasing the number of turns in the moving coil. لمتابعة مستر احمد الباشا وكل ما يخص الساينس : جروب الفيس بوك http://bit.ly/2Of1mcN صفحة الفيس بوك http://bit.ly/2Gq5xMo بالتوفيق مستر احمد الباشا