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magnetic effects of electric current — Science STD 10 — Question

Gujarat BoardEnglish MediumSTD 10Sciencemagnetic effects of electric current4 Marks
Question
To understand the magnetic field produced by a bar magnet.
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Answer

 
  • Procedure:
  • Fix a sheet of white paper on a drawing board using some adhesive material.
  • Place a bar magnet in the centre of it.
  • Sprinkle some iron filings uniformly around a bar magnet as shown in figure.
  • A salt-sprinkler may be used for this purpose.
  • Now tap the board gently.
  • What do you observe?
  • Why do the iron filings arrange in such a pattern?
  • What does this pattern demonstrate?
  • Observation:
  • The iron filings arrange themselves in a pattern as shown in figure.
  • A bar magnet exerts its influence in the region surrounding it.
  • Therefore, the iron filings experience a magnetic force.
  • This force makes iron filings arrange in a specific (particular) pattern.
  • The region surrounding a magnet, in which the force of the magnet can be detected, is said to have a magnetic field.
  • The lines along which the iron filings align themselves represent magnetic field lines.
  • Conclusion:
  • A bar magnet possesses a magnetic field which can be detected by sprinkling iron filings around it.

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