Question on: WAEC Physics - 1990
Calculate the current in the 3Ω resistor shown in
the diagram above.
A
3.0A
B
4.0A
C
4.3A
D
12.0A
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Correct Option: B
Total Resistance R = 1/R = 1/R1 + 1/R2 + 1/R3
R = 12/13Ω
V = IR = (12/13) x 13 = 12v
1 across 3Ω = V/R = 12/3 = 4A
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