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Calculate the current in the 3 resistor shown in the diagram above.

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Question 123
A
3.0A
B
4.0A
C
4.3A
D
12.0A
E
39.0A
Explanation
Total Resistance R = 1/R = 1/R1 + 1/R2 + 1/R3
R = 12/13
V = IR = (12/13) x 13 = 12v
1 across 3 = V/R = 12/3 = 4A

Correct option: B

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