What is the dependent variable in the magnetic fields investigation?

Location and direction of magnetic field lines

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What are the steps for using iron filings to map a magnetic field?

  1. Place magnet under paper.
  2. Sprinkle iron filings around the magnet.
  3. Tap paper to distribute filings.
  4. Observe iron filing pattern.

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What are the steps for using a plotting compass to map a magnetic field?

  1. Place magnet on paper.
  2. Place compass near the magnet's north pole.
  3. Mark where the compass needle points.
  4. Repeat steps 2-3.
  5. Connect marks to show field shape.

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What is the aim of the magnetic fields practical?

To determine the shape of the magnetic field around a bar magnet

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Why do we need to tap the paper gently when finding the shape of a magnetic field around a bar magnet using iron filings?

To distribute the iron filings evenly.

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