Question

The current through 15 V battery is :

• A. 1A
• B. 2A
• C. 3A
• D. 4A

Answer 1

The correct option is C 3A

In the given circuit, consider the current $i_1$ through 5V battery is

$i_1=\frac{(15-5)}{5}$

$\therefore i_1=2$ A

Also the current $i_2$ through 10V battery is,

$i_2=\frac{(15-10)}{5}$

$\therefore i_2=1$ A

Now the current $i$ through 15V battery is,

$i=i_1+i_2$

$i=2+1=3$ A