If the total voltage drops across the passive elements in the loop are…

Question

If the total voltage drops across the passive elements in the loop are $12\,	ext{V}$, $8\,	ext{V}$, and $10\,	ext{V}$, what must the source voltage be according to Kirchhoff's Voltage Law?

Accepted Answer

C. $30\,	ext{V}$

By KVL, total voltage rise equals total voltage drop in a closed loop. The drops add to $12+8+10=30\,	ext{V}$, so the source must provide $30\,	ext{V}$.

Answer

$10\,	ext{V}$

Answer

$20\,	ext{V}$

Answer

$0\,	ext{V}$

If the total voltage drops across the passive elements in the loop are $12\,\text{V}$, $8\,\text{V}$, and $10\,\text{V}$, what must the source voltage be according to Kirchhoff's Voltage Law?