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JEE Advanced Model Paper 14 with solutions for online practice
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© examsnet.com
Question : 8
Total: 60
The diagram shows an AC circuit with two voltage sources of same frequency. Find out the value of current I shown in the fig
I =
V
0
c
o
s
(
ω
t
)
R
I =
V
0
c
o
s
(
ω
t
+
π
∕
2
)
R
I =
V
0
c
o
s
ω
t
R
I =
−
3
V
0
c
o
s
ω
t
R
Validate
Solution:
Applying KVL in the outer loop
V
0
cos ωt + IR -
2
V
0
cos (ωt + π) = 0
⇒ IR =
2
V
0
cos (ωt + π) -
V
0
cos ωt
⇒ I =
−
2
V
0
c
o
s
ω
t
−
V
0
c
o
s
ω
t
R
=
−
3
V
0
c
o
s
ω
t
R
© examsnet.com
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