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Tardigrade
Question
Physics
A coil of area 0.4 m2 has 100 turns. A magnetic field of 0.04 Wb m-2 is acting normal to the coil surface. If this magnetic field is reduced to zero in 0.01 s, then the induced emf in the coil is
Q. A coil of area
0.4
m
2
has
100
turns. A magnetic field of
0.04
Wb
m
−
2
is acting normal to the coil surface. If this magnetic field is reduced to zero in
0.01
s
, then the induced emf in the coil is
3120
241
Electromagnetic Induction
Report Error
A
160
V
72%
B
250
V
12%
C
270
V
12%
D
320
V
5%
Solution:
Here,
A
=
0.4
m
2
,
N
=
100
,
d
B
=
0.04
Wb
m
−
2
,
d
t
=
0.01
s
As
ε
=
d
t
d
ϕ
=
N
A
d
t
d
B
=
100
×
0.4
×
0.01
0.04
=
160
V