Electro- magnetism questions | form six Physics

Consider two parallel co-axial circular coils of equal radius R, and number of turns ​ N ​ , carrying equal currents ​ I in the same direction and separated by a distance ​ R . ​ Show that , ​ where ​ B is the field on the axis around the mid-point between the coils which is uniformly distributed over a distance that is small as compared to ​ R and μ​_o is the permeability of free space.

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UNSOLVED

Identify four factors that affect the force experienced by a current-carrying conductor in a magnetic field.

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UNSOLVED

Write the mathematical expression which define magnetic flux density and use it to deduce its S.I units.

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Apply the mathematical expression which define magnetic flux density to develop the formula for the force on a conductor carrying current I if the conductor and the magnetic fields are not at right angles.

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Distinguish the terms magnetically soft and magnetically hard materials.

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UNSOLVED