Derive an expression for the force experienced per unit length by two infinitely parallel
current-carrying conductor Show that force between
them is attractive, when current flowing between them have same direction.
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One ampere of current can be defined as the amount of current which through two infinitely long parallel wires separated by one metre produces an attractive force of 2×107Nm-1. The wires must have negligible circular cross-section and they must be placed in vaccum.
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