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Byju's Answer
Standard XII
Physics
Ohm's Law in Scalar Form
Figure shows ...
Question
Figure shows a part of a circuit. If a current of
12
m
A
exists in the
5
k
Ω
resistor, find the currents in the other three resistors. What is the potential difference between the points
A
and
B
?
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Solution
i
1
×
20
=
i
2
×
10
⇒
i
1
i
2
=
10
20
=
1
2
i
1
=
4
m
A
,
i
2
=
8
m
A
current in
20
K
Ω
resistor
=
4
m
A
Current in
10
K
Ω
resistor
=
8
m
A
Current in
100
K
Ω
resistor
=
12
m
A
V
=
V
1
+
V
2
+
V
3
V
=
5
K
Ω
×
12
m
A
+
10
K
Ω
×
8
m
A
+
100
K
Ω
×
12
m
A
V
=
60
+
80
+
1200
=
1340
volts.
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Q.
Figure (32-E10) shows a part of an electric circuit. The potentials at the points a, b and c are 30 V, 12 V and 2 V respectively. Find the currents through the three resistors.