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Course: Science — Third Preparatory
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Science — Third Preparatory

Science — Third Preparatory

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Science — Third Preparatory 2026/2027

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Unit 1 - Force, Motion, Acceleration and Physical Quantities

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Text lesson

Unit 2 — Electricity and Magnetism

Science — Third Preparatory

Unit 2 — Electricity and Magnetism

📌 Comprehensive Scientific Terminology & Definitions:

📌 Comprehensive Scientific Terminology & Definitions:

Comparison aspectMain ideaKeywords
Electric Current Intensity (I) (شدة التيار الكهربي)
  • The quantity of electric charge (Q in Coulombs) passing through a given cross-section of a conductor in one second: I = Q / t (measured in Amperes
  • where 1 A = 1 C/s)
quantitychargeCoulombspassing
Electric Potential Difference (V) (فرق الجهد الكهربي)
  • The work done (W in Joules) to transfer a unit positive charge (1 Coulomb) between two points in an electric circuit: V = W / Q (measured in Volts
  • where 1 V = 1 J/C)
workdoneJoulestransfer
Ohm’s Law & Electric Resistance (R) (قانون أوم والمقاومة)
  • The electric current passing through a metallic conductor is directly proportional to the potential difference across its terminals
  • provided temperature remains constant: V = I · R (R measured in Ohms Ω)
currentpassingthroughmetallic
  • Electromotive Force (EMF) of Electric Cells (القوة الدافعة الكهربية للعمود): The total potential difference between the terminals of an electric cell or battery when the circuit is open (zero current flowing).
  • Magnetic Effect of Current & Electromagnets (التأثير المغناطيسي والمغناطيس الكهربي): An electric current flowing through a coiled wire creates a magnetic field around it; placing a soft iron core inside dramatically concentrates magnetic flux, forming a temporary electromagnet used in electric cranes and bells.
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