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SubjectsGeneral SciencePhysicsChapter 3 — Electricity & Magnetism3.2 Magnetism

Topic 3.2 · General Science · Electricity & Magnetism

Magnetism

Magnetism is studied as part of "Electricity & Magnetism" (Physics) in General Science. Electric circuits, magnetism, electromagnetic induction and semiconductor basics power modern technology and are frequent exam topics.

In the examination context, magnetism carries conceptual questions that test both factual recall and analytical understanding. Revise this topic in sequence with the rest of the chapter so that chronological and thematic links are clear.

Important Facts

Ohm's law
V = IR
Transformer
Works on electromagnetic induction
p-n junction
Basis of the diode
SI unit of current
Ampere

Key Points

  • SI unit of current — Ampere
  • Ohm's law — V = IR
  • Transformer — Works on electromagnetic induction
  • p-n junction — Basis of the diode

Important Names

Georg OhmMichael FaradayAndré-Marie Ampère

Important Dates

1820Oersted discovered electromagnetism
Exam-Oriented Notes
  • »Current is measured by ammeter in series; voltage by voltmeter in parallel. Resistance = V/I.

Related topics

3.1 Electric Current & Circuits3.3 Electromagnetic Induction3.4 Semiconductors & Logic Gates
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