- #1
Adesh
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- Homework Statement
- Find the magnetic field at point P on the axis of a tightly wound solenoid (helical coil) consisting of n turns per unit length wrapped around a cylindrical tube of radius ##a## and carrying current ##I##(Figure 25). Express your answer in terms of ##\theta_1## and ##\theta_2## (it's easiest that way). Consider the turns to be essentially circular, and use the result of example 6. What is the field on the axis of infinite solenoid (infinite in both directions) ?
- Relevant Equations
- ## \tan \theta _1 = \frac{a}{z} ##
## \tan \theta _2 = \frac{a}{l+z}## where l is the length of the solenoid and z is the distance from the forward center to the point P.
Here is the image
## \tan \theta _1 = \frac{a}{z} ##
## \tan \theta _2 = \frac{a}{l+z}## where l is the length of the solenoid and z is the distance from the forward center to the point P.
My doubt is how ##\theta_1## going to become 0 and ##\theta_2## ##\pi## as the length of solenoid going to go to infinity. Please help me in seeing that.
## \tan \theta _1 = \frac{a}{z} ##
## \tan \theta _2 = \frac{a}{l+z}## where l is the length of the solenoid and z is the distance from the forward center to the point P.
My doubt is how ##\theta_1## going to become 0 and ##\theta_2## ##\pi## as the length of solenoid going to go to infinity. Please help me in seeing that.
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