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JEE Main 10 Apr 2019 Paper 1 Solved Paper
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© examsnet.com
Question : 10
Total: 90
In the given circuit,an ideal voltmeter connected across the 10Ω resistance reads 2V. The internal resistance r, of each cell is
0.5Ω
0Ω
1.5Ω
1Ω
Validate
Solution:
V
A
B
=
2
,
10
i
1
=
2
⇒
i
1
=
1
5
15
i
2
=
2
⇒
i
2
=
2
15
i
1
+
i
2
=
1
3
3
−
2
r
(
i
1
+
i
2
)
−
10
i
1
−
2
(
i
1
+
i
2
)
=
0
1
−
2
3
=
2
r
3
⇒
1
3
=
2
r
3
r
=
1
2
=
0.5
Ω
© examsnet.com
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