Question

The magnitude of current i in ampere unit is

• A. 0.1
• B. 0.3
• C. 0.6
• D. None of these

Answer 1

Answer: (A)

Applying Kirchhoffs law in the given figure.
At junction $A$
$i+i_1+i_2=1\dots$ (i)
For loop (1)
$-60i+(15+5)i_1=0$
$\Rightarrow i_1=3i\dots$ (ii)
For loop (2)
$-(15+5)i_1+10i_2=0$
$\Rightarrow i_2=2i_1=6i\dots$ (iii)
On solving Eqs. (i), (ii) and (iii), we get
$i=0.1A$