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Byju's Answer
Standard XII
Physics
Potentiometer
Find out the ...
Question
Find out the current flowing through resistor
R
1
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Solution
Resistance
R
1
&
R
2
are parallel and
R
3
&
R
4
are in series. Replace them with requirement resistance.
apply
L
1
L
i
n
GEHG$,
5
−
400
(
I
1
+
I
2
)
+
5
=
0
⇒
I
1
+
I
2
=
4
1
40
→
(
1
)
in
A
C
E
F
A
,
−
500
I
2
−
400
(
I
1
+
I
2
)
+
50
(
I
−
(
I
1
+
I
2
)
)
=
0
⇒
19
I
2
+
9
I
1
−
I
=
0
→
(
2
)
in
B
C
D
G
P
,
−
500
I
1
−
5
+
5
=
0
⇒
I
2
=
0
⇒
(
3
)
that given
I
1
=
1
40
A
I
2
=
−
4
O
A
k
I
=
19
40
A
through
50
σ
, current in
=
I
−
(
I
1
+
I
2
)
=
18
40
=
0.45
A
⇒
current through each
R
1
,
R
2
=
0.45
2
=
0.225
m
A
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