A long solenoid has a radius of 3cm, 5,000 turns/m, and carries current I = 0.25 A. The region 0 < ? < a within the solenoid has ?r = 5, while ?r = 1 for a < ? < 3 cm. a) Find a so that a total flux of 10 ?Wb is present. b) Find a so that the flux is equally-divided between the regions 0 < ? < a and a < ? < 3cm.

A long solenoid has a radius of 3cm, 5,000 turns/m, and carries current I = 0.25 A. The region

0 < ? < a within the solenoid has ?r = 5, while ?r = 1 for a < ? < 3 cm.

a) Find a so that a total flux of 10 ?Wb is present.
b) Find a so that the flux is equally-divided between the regions 0 < ? < a and a < ? < 3cm.

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A long solenoid has a radius of 3cm, 5,000 turns/m, and carries current I = 0.25 A. The region 0 < ? < a within the solenoid has ?r = 5, while ?r = 1 for a < ? < 3 c…

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