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When a 12V battery is connected across an unknown resistor, there is a current of 2.5 mA in the circuit. Find the value of the resistance of the resistor.
Medium
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Solution
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Given:
V
=
1
2
V
I
=
2
.
5
m
A
Let the resistance be
R
By Ohm's Law,
V
=
I
R
1
2
=
2
.
5
×
1
0
−
3
R
R
=
4
.
8
×
1
0
3
Ω
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