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Magnetic Effects of Electric Current — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceMagnetic Effects of Electric Current1 Mark
MCQ
A magnetic field is produced by the current passing through a long straight wire. When will the strength of the magnetic field increase?
  • ✓
    When the magnitude of the current increases
  • B
    When the distance from the wire increases
  • C
    Both $A$ and $B$
  • D
    None of these
✓

Answer

Correct option: A.
When the magnitude of the current increases
A metallic wire carrying an electric current has associated with it a magnetic field. The magnitude of the magnetic field produced at a given point increases as the current through the wire increases. The magnetic field produced by a given current in the conductor decreases as the distance from it increases.

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