What's the relationship between the electric field at the centre of the solenoid and the length of a solenoid
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What's the relationship between the electric field at the centre of the solenoid and the length of a solenoid

[From: ] [author: ] [Date: 11-09-25] [Hit: ]
Experts, please help-I think you mean magnetic field, not electric field.Substituting,......
Given length of the solenoid is L.
I tried the following way.
I found that electric field at the centre of a solenoid is B = u0*n*i, where n = loops(N)/unit length(h).
number of loops = circumference/length of the solenoid (i hope i got it right)
so B = u0*(2*pi*r/L*h)*i. From that i said B is inversely proportional to L(length of the solenoid). But i don't know if this is correct.

Experts, please help

-
I think you mean magnetic field, not electric field.
In your first equation the n = N / L (Number of turns / Length
Substituting, B = u0*N*I / L
B is directly proportional to the number of turns and the current and inversely proportional to the solenoid length
In your second equation you confused the length of the wire with the length of the solenoid
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