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Metals and Non-Metals — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceMetals and Non-Metals5 Marks
Question
  1. Draw magnetic field lines produced around a current carrying straight conductor passing through a cardboard. Name, state and apply the rule to mark the direction of these field lines.
  2. How will be strenght of the magnetic field change when the point where magnetic field is to be determined is moved away from the stright wire carrying constant current? Justify your answer.
✓

Answer

  1.  


Rule: Right hand thumb rule Imagine that you are holding a current-carrying straight conductor in your right hand such that the thumb points towards the direction of current. Then your fingers will wrap around the conductor in the direction of the field lines of the magnetic field.
  1. Strength decreases.
Reason: The concentric circles representing the magnetic field around a current-carrying straight wire become larger and longer as the distance increases.

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