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Physics

Force between Two Parallel Currents (the Ampere)

दो समानांतर धारावाही तारों के बीच बल (ऐम्पियर)

In this Class 12 Physics topic from Moving Charges and Magnetism, students learn how two long, parallel current-carrying conductors exert magnetic force on each other. They understand why currents in the same direction attract while opposite currents repel, and use the relation F/L = μ₀I₁I₂/(2πd) to calculate force per unit length in vacuum. The topic also connects this result with the classical force-based definition of the ampere and strengthens understanding of magnetic fields produced by electric currents.

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