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Byju's Answer
Standard XII
Physics
Kirchhoff's Voltage Law
If deflection...
Question
If deflection of galvanometer is zero, then value of E is
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Solution
18
=
i
1
[
1
+
6
+
2
]
⇒
i
1
=
2
A
i
2
=
(
15
−
E
)
10
−
(
1
)
For zero deflection of galvanometer
V
A
B
=
V
C
D
⇒
6
i
1
=
15
−
5
i
2
6
×
2
=
15
−
5
i
2
⇒
i
2
=
3
5
−
(
2
)
By (1) & (2)
15
−
E
10
=
3
5
⇒
E
=
15
−
6
⇒
E
=
9
V
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