Calculate the value of resistance r1 in the parallel circuit
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Explanation:
You have 4 resistors all connected in parallel. R1 and R2 each have a resistance of 4 ohms, R3 and R4 each have a resistance of 8 ohms. What is the total resistance?
1
Rp
=
1
R1
+
1
R2
+
1
R3
+
1
R4
1
Rp
=
1
4
+
1
4
+
1
8
+
1
8
(Find a common denominator)
1
Rp
=
2
8
+
2
8
+
1
8
+
1
8
1
Rp
=
6
8
(Rp is the reciprocal of this)
Rp =
8
6
= 1.33 ohms
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