Question

Find the total current that passes through the circuit given in the diagram. Also find the potential difference across 1ohm resistor

Answer 1

first find the equivalent resistance of circuit , we have 6,12,4 in parallel combination so 1/R4=1/R1 + 1/R2+1/R3

so 1/R4= 1/6 + 1/12 + 1/4
1/R4= (2+1+3)/12
R4=2ohm

now this R4 is in series combination with 1 n 2 ohm

so equivalent resistance= 2+1+2=5ohm

so total current of circuit I=V/R
I=1.5/5=0.3A

so voltage across 1ohm resistor V1=I ×1
V=0.3×1= 0.3 volt