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Byju's Answer
Standard X
Physics
Electric Potential and Potential Difference
What is Kirch...
Question
What is Kirchoff's current law of electric circuit ? In the given figure, calculate the potential difference between
A
and
C
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Solution
In given figure,
K
C
L
:At any node the sum of all outgoing current is zero.
x
−
100
60
+
x
−
100
60
+
x
−
0
20
=
0
[at node C]
⇒
x
=
44
V
∴
V
A
−
V
C
=
110
V
−
x
v
=
110
−
44
=
6
v
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Similar questions
Q.
For a given circuit, calculate
(i) equivalent resistance between the points
A
and
C
.
(ii) current in the circuit
(iii) potential difference between
A
and
B
Q.
In the given electric circuit, calculate:
(i) the value of resistance
R
.
(ii) potential difference between
A
and
B
.
Q.
Ohm's law gives a relationship between:
(a) current and resistance
(b) resistance and potential difference
(c) potential difference and electric charge
(d) current and potential difference
Q.
(a) What is the ratio of potential difference and current known as?
(b) The values of potential difference V applies across a resistor and the corresponding values of current I flowing in the resistor are given below:
Potential differences, V (in volts)
:
2.5
5.0
10.0
15.0
20.0
25.0
Current, I (in amperes)
:
0.1
0.2
0.4
0.6
0.8
1.0
Plot a graph between V and I, and calculate the resistance of the resistor.
(c) Name the law which is illustrated by the above VāI graph.
(d) Write down the formula which states the relation between potential difference, current and resistance.
(e) The potential difference between the terminals of an electric iron is 240 V and the current is 5.0 A. What is the resistance of the electric iron?