• Define Selo inductance and derive on exper
ssion box Self-inductance of an air cored
solenard col length And ab reo reten
''
having N
turns
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1
Answer:
Consider a current(I) is passed through the inductor (L).
A: Cross-sectional area
N : Number of turns
L : Length
Magnetic field generated at inside the solenoid is ,
B=
L
μ
o
NI
So, the flux through the coil is a obtained:
ϕ
B
=N(
B
.
A
) (
B
and
A
are along same direction)
ϕ
B
=
L
μ
o
N
2
IA
...(1)
Now, flux (ϕ
B
) is related to inductance (L) as
ϕ
B
=LI
⇒L=
I
ϕ
B
From (1) we get,
⇒L=
L
μ
0
N
2
A
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