MCQ
In the circuit shown below, calculate the current flowing through $20V$ cell.
- A$12A$
- B$15A$
- ✓$12.5A$
- D$12.3A$
✓
Answer
Correct option: C.
$12.5A$
Here, we can apply Kirchhoff's loop rule in closed loops $\text{ADCBA, AEFBA, AHGBA,}$ and $\text{AIJBA.}$Thus, we get
$20+10-5 I_1=0 \rightarrow I_1=6 A$
$-5+20-15 I_2=0 \rightarrow I_2=1 A$
$25+20-10 I _3=0 \rightarrow I _3=4.5 A$
$-15+20-5 I _4=0 \rightarrow I _4=1 A$
Therefore, the current flowing through the $20 V$ cell $=6+1+4.5+1=12.5 A$
$20+10-5 I_1=0 \rightarrow I_1=6 A$
$-5+20-15 I_2=0 \rightarrow I_2=1 A$
$25+20-10 I _3=0 \rightarrow I _3=4.5 A$
$-15+20-5 I _4=0 \rightarrow I _4=1 A$
Therefore, the current flowing through the $20 V$ cell $=6+1+4.5+1=12.5 A$
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