The formula for Circulating chargers is :
in writing describe the following for the above formula:
- any concealed point, or analysis of the formula
- when the equation cannot be used
- Restrictions& limitations to the domain of each .independent variable(s)
- limits on the range of each dependent variable.
there is example of how you should write something like this
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This is an example of how you should do it .
For ex. for this equation
has the following restriction :
*Interfering waves must be 180 degrees out of phase with each other.
*Interference must be continuous.
*The string must oscillate with the largest possible amplitude at these locations.
* n can only be positive, integer values
B- 1 solenoid)
Solution
Analysis of the above formula, it's clear If n is the number of turns of coil per unit length
(denoted by nl )of the solenoid, the total current crossing the amperian loop is I
nl.Therefore,Ampere's circuital law gives
B= u 0 In where l =1

Ideal solenoid produces a magnetic field inside and along the axis of solenoid and a point well
away from its ends, magnetic field is uniform.
The magnectic field on the lateral sides is weak, so it can be neglected or zero.
For the short solenoid ,we use the equation for the magnetic field at a point on the axis of
solenoid is
B =u 0 nI( cos?-cos?)/2
Where ? and ? are the angle at its end.
For long solenoid, at a point on its axis inside the solenoid and Well away from its end ? =0 0
and
?=180 0
and at a point on its axis near end ,?= 90 0
and ?=180 0
n can only positive ,Intel value.