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Technical Sciences Question 10.1

Technical Sciences Grade 12 · NSC September 2025 P1 (Eastern Cape)

Name the law used to describe this phenomenon.

Eastern Cape DoE September 2025 1 mark (1) Electromagnetism Induction Term 3

About this question

Question 10.1 of Technical Sciences Grade 12 Paper 1, NSC Preparatory Examination (Eastern Cape DoE, September 2025). It tests the Term 3 ATP topic Electromagnetism Induction.

  • TermTerm 3
  • ATP topicElectromagnetism Induction
  • PaperPaper 1
  • Marks1 mark
Experiment: bar magnet and coil

An experiment investigates electromagnetic induction using a bar magnet and a cylindrical coil. An electromotive force is generated by moving the bar magnet in and out of the coil.

A bar magnet moving towards a cylindrical coil connected to a galvanometer
Answer
1 mark

Faraday's law of electromagnetic induction.

Study this in your textbook: CAPS Annual Teaching Plan, Grade 12, Term 3: Electricity, Magnetism & Electrochemistry.

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NSC September 2025 P1 (Eastern Cape) Electromagnetism Induction (3)
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\[ \varepsilon = -N\frac{\Delta\phi}{\Delta t} \]\[ 20 = -11\,\frac{\Delta\phi}{0{,}5} \]

\( \Delta\phi = -0{,}91\ \text{Wb} \) (a change of \(0{,}91\ \text{Wb}\) in magnitude)

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NSC September 2025 P1 (Eastern Cape) Electromagnetism Induction (2)
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When the magnetic flux linked with a coil changes, an emf is induced in the coil. The size of the induced emf is directly proportional to the rate of change of the magnetic flux.

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NSC September 2025 P1 (Eastern Cape) Electromagnetism Induction (1 x 2)
  • A DC generator.
  • B AC motor.
  • C AC generator.
  • D DC motor.
Answer

A: DC generator.

A split-ring commutator gives direct current, and a machine that turns mechanical energy into electrical energy is a generator.

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