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Magnetism — JEE physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceJEE physicsMagnetism1 Mark
Question
Assertion : Magnetism is relativistic.
Reason : When we move along with the charge so that there is no motion relative to us, we find no magnetic field associated with the charge.
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Answer

(a) A magnetic field is produced by the motion of electric charge. Since motion is relative, the magnetic field is also relative.

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