Question

In the circuit shown, current flowing through $25V$ cell is

• A. 7.2 A
• B. 10 A
• C. 12 A
• D. 14.2 A

Answer 1

Answer: (C)

Applying $KVL$ in loop $ABCDA,ABFEA,ABGHA$ and $ABJIA$, we get
$30-i_1\times 11=-25\dots$ (i)
$20+i_2\times 5=25$... (ii)
$5-i_3\times 10=-25\dots$ (iii)
$10+i_4\times 5=25$... (iv)
Solving equations (i), (ii), (iii) and (iv) we get
$i_1=5A,i_2=1A,i_3=3A$ and $i_4=3A$
Hence, current flowing through $25V$ cell is $12A$.