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KEAM 2010 Physics and Chemistry Paper
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© examsnet.com
Question : 10
Total: 119
A
50
H
z
AC current of peak value 2 A flows through one of the pair of coils. If the mutual inductance between the pair of coils is
150
m
H
, then the peak value of voltage induced in the second coil is
30
π
V
60
π
V
15
π
V
300
π
V
3
π
V
Validate
Solution:
M
=
150
×
10
−
3
H
i
=
2
A
f
=
50
H
z
Induced voltage,
e
=
d
ϕ
d
t
=
d
d
t
(
M
i
)
=
d
d
t
(
M
i
0
sin
ω
t
)
=
M
i
0
ω
cos
ω
t
e is maximum when
cos
ω
t
=
1
∴
e
=
M
i
0
ω
=
150
×
10
−
3
×
i
×
2
π
f
=
150
×
10
−
3
×
2
×
2
π
×
50
=
30
π
V
© examsnet.com
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