find out the total strain induced in a wire having the length of 10 cm and 6 cm breadth if change in length is 1 cm
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Explanation:
Consider a strip of width dy at y distance from the wire
for infinite long wire
B=
4π
μ
o
y
2I
area of strips=bdy
dϕ=2I
4π
μ
o
y
b
dy
ϕ=∫
x
x+l
2I
4π
μ
o
y
b
dy
ϕ=
4π
2Iμ
o
b
ln
x
x+l
now Induced emf =
dt
dϕ
=
2π
Iμ
o
b
(
x+l
x
)(−
x
2
l
)
dt
dx
Magnitude of emf =
2π
Iμ
o
bl
(
x(x+l)
v
)
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