A long solenoid has 2000 turns m and radius is 6cm. If Current is varied at a uniform rate of 0.01 AS-' then find clectric field induced at a
point outside the solenoid at distance 8cm from its axis.
Answers
Answered by
2
ANSWER
dt
di
=0.01A/S
For 2s(
dt
di
)=0.02A/S
n=2000 turn/m, R=6.0 cm = 0.06 m
r=1 cm = 0.01 m
(a)ϕ=BA
⇒
dt
dϕ
=μ
o
nA
dt
di
=4π×10
−7
×2×10
−3
×π×1×10
=16π
2
×10
−10
ω
=1.6×10
−8
ω
or,
dt
dϕ
for 1s=0.785ω
(b)∫E.dl=
dt
dϕ
⇒Eϕdl=
dt
dϕ
⇒E=
2π×10
−2
0.785×10
−8
=1.2×10
−7
V/m
(c)
dt
dϕ
=μ
o
n
dt
di
A=4π×10
−7
×2000×0.01×π×(0.06)
2
Eϕdl=
dt
dϕ
E=
2πr
dϕ/dt
=
π×8×10
−2
4π×10
−7
×2000×0.01×π×(0.06)
2
=5.64×10
−7
V/m
Answered by
3
Explanation:
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