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Question
Physics
When the rate of change of current is unity, the induced emf is equal to
Q. When the rate of change of current is unity, the induced emf is equal to
1991
219
Electromagnetic Induction
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A
thickness of coil
13%
B
number of turns in coil
15%
C
coefficient of self inductance
57%
D
total flux linked with coil
15%
Solution:
Induced emf is equal to
emf
=
−
d
t
d
(
N
∅
)
=
d
t
−
d
(
L
i
)
=
−
L
d
t
d
i
So, when rate of change of current is equal to unity, emf is equal to coefficent of self inductance.