For the circuit shown in the diagram below:

What is the value of :
Current through $6 Ω$ resistor?
Potential difference across $12 Ω$ resistor?
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As per the circuit
$V = 4V$
Total resistance in line $1 = R_1 = 6 + 3 = 3$ ohm
Total resistance in line $2 = R_2 = 12 + 3 = 15$ ohm
Current through $6\Omega$ resistor = current through line $1=\frac{\text{=V}}{\text{R}_1}=\frac{4}{9}=0.44\Omega$
p.d. across line $2$ is $4V$
current through line $2=\frac{\text{V}}{\text{R}_2}=\frac{4}{15}\Omega$
p.d. across $12\Omega$ resistor $=\frac{4}{15}\times12=3.2\text{V}$
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