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IIT JEE Advanced 2012 Paper 1
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© examsnet.com
Question : 15
Total: 60
For the resistance network shown in the figure, choose the correct option(s).
The current through PQ is zero.
I
1
= 3A.
The potential at S is less than that at Q.
I
2
= 2A.
Validate
Solution:
From Wheatstone bridge, since the nodes P and Q are equipotential, then nodes S and T are also equipotential; therefore, no current passes through PQ and ST. Therefore, further simplified network is as shown in the following figure:
I
1
=
12
4
= 3 A
I
2
=
I
1
(
12
6
+
12
)
= 2 A
© examsnet.com
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