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Standard XII
Physics
EMF and EMF Devices
Energy requir...
Question
Energy required to establish a current of
4
A
in a coil of self-inductance
L
=
200
m
H
is
A
0.16
J
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B
0.18
J
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C
0.40
J
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D
1.6
J
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Solution
The correct option is
C
1.6
J
Energy stored in a self-inductor,
E
=
1
2
L
i
2
=
1
2
×
200
×
10
−
3
[
4
]
2
=
1.6
J
.
Suggest Corrections
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