revision sheet 3rd prep u 2.doc - Manaret eleman language schools Date:\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026 science department Prep.3

revision sheet 3rd prep u 2.doc - Manaret eleman language...

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Manaret eleman language schools science department Date:………………………………………………. Prep.3 1-What's meant by: 1 - The electric potential……………………………………………………………………… …….. …………………………………………………………………………………… ……………………………………. 2- Potential difference ……………………………………………………………… …….. ………………………………………………………………………… …………………………………. 3- Volt……………………………………………………………………………… …………………………….. 4- Joule…………………………………………………………………………… ………………………….. 5- Electromotive force (e.m.f.) ……………………………………………………………….. …………………………………………………………………………………… …………………………………… 6-The electric resistance ………………………………………………………………………. …………………………………………………………………………………… ……………………………….. 7 - Ohm…………………………………………………………………………… ……………………………. …………………………………………………………………………………… …………………………………. 8- The variable resistance (the sliding Rheostat) ……………………….. …………………………………………………………………………………… ……………………………………. 1
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9- direct electric current…………………………………………………………………………. …………………………………………………………………………………… …………………………………… 10-Alternating electric current……………………………………………………………….. …………………………………………………………………………………… …………………………………… 11 - The radio activity phenomenon…………………………………………………………. …………………………………………………………………………………… ……………………………………. 12-Radioactive elements……………………………………………………………………… ……… …………………………………………………………………………………… …………………………………….. 13 - Natural radioactivity………………………………………………………………… ………….. …………………………………………………………………………………… …………………………………….. 14- Artificial radioactivity………………………………………………………………… ……… …………………………………………………………………………………… ……………………………………… 15- Isotopes……………………………………………………………………… ………………………….. …………………………………………………………………………………… ……………………………………… 16- Rem…………………………………………………………………………… ………………………………… 17- Electric current intensity: 2
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…………………………………………………………………………………… ……………………………………. 18-Ampere: …………………………………………………………………………………… ………………………………….. 19-The coulomb: …………………………………………………………………………………… ……………………………………. 2- Problems: 1) If an electric current of 30 ampere passes in an electric heater and the P.d between its two ends is 240V, calculate the heater resistance. …………………………………………………………………………………… ………………………………………….. …………………………………………………………………………………… ………………………………… 2) If the work done to transfer electric charges of 300 coulombs between 2 points is 333000 joule, calculate the potential difference between the 2 points. …………………………………………………………………………………… …………………………………….. …………………………………………………………………………………… ………………………………………. 3) Calculate the electric current intensity due to the flow of 5400 coulombs in 5 min through a conductor. …………………………………………………………………………………… …………………………………………………………………………………… ……………………………………………………………………………… 4) You have 4 similar cells each of e.m.f of 1.5 V, show by drawing how can you obtain an e.m.f of: 1- 1.5 V 2- 3 V 3- 6V 4- 4.5 V 3
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…………………………………………………………………………………… …………………………………………………………………………………… …………………………………………………………………………………… …………………………………………………………………………………… ………………………………… 3) Compare between each of the following: 1- The direct electric current & the alternating electric current.
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