PHYSICS NOTES ON MAGNETIC FIELD DUE TO CURRENT
CLASS : 11
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A Helmoholtz coil consists of two identical coaxial circular coils separated by the distance equal to the radius of the coil. The force is attractive if current is in same direction and repulsive if current is in opposite direction. Definition of Ampere :If force per unit length between two parallel conductor carrying equal current is 2 x 10-7 Nm-1, then current in each conductor is called one ampere current.
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Physics