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AP EAMCET Engineering 2011 Solved Paper
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© examsnet.com
Question : 39
Total: 160
A constant voltage of
25
V
is applied to a series
L
−
R
circuit at
t
=
0
, by closing a switch.
What is the potential difference across the resistor and the inductor at time
t
=
0
?
0
V
,
25
V
12.5
V
,
1.25
V
10
V
,
15
V
25
V
,
0
V
Validate
Solution:
At,
t
=
0
, switch closes
Current
i
=
i
0
[
1
−
e
−
t
R
∕
L
]
So, at
t
=
0
,
i
=
0
So, potential across inductor
=
25
V
and across resistor
=
0
V
© examsnet.com
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