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## Homework Statement

Two identical coils are parallel to each other on the same axis. They are separated by a distance equal to their radius R. They each have N turns and carry equal currents I in the same direction.

Find an expression for the magnetic field strength at the midpoint between the loops.

Express your answer in terms of the variables R, N, I, and appropriate constants.

## Homework Equations

B = μIN/l

## The Attempt at a Solution

I know the above equation for the magnetic field inside of a solenoid, but I have no idea how to find the dissipated magnetic field 1/2 R away from the solenoid.

Since there are two identical solenoids facing the same direction, I'm assuming the magnetic field will be double the dissipated magnetic field of one of the solenoids 1/2 R away from the coils.

Any formulas or direction on what to do to obtain the dissipated magnetic formula will be appreciated!