Two circular coils of diameter 30.0 cm are parallel to each other and have their centers along the same line L but separated by 22.0 cm.When an experimenter views the coils along L,the coil closer to her carries a clockwise current of 2.50 A.Find the magnitude and sense (clockwise or counterclockwise)of the current needed in the other coil so that the net magnetic field on L midway between the two coils will have a magnitude of 4.10 µT and point away from the experimenter who is viewing the coils along L. 
Definitions:
Covalent
A type of chemical bond where atoms share pairs of electrons.
Ionic
Relating to ions or the formation of ions by the gaining or losing of electrons, often discussed in the context of chemical bonds.
Metallic
Pertaining to, composed of, or resembling metal; having the characteristics or qualities of metals.
Intermolecular
Relating to the forces or interactions between molecules, which determine phase states and properties of substances.
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