Question

In the circuit shown, the lowest voltage drop will occur across which of the following resistors?

R1, R2, R3, or R4 ?

Answer 1

here, the total resistance, is:
\[\Large {R_{TOTAL}} = 8.5 + 3.2 + \frac{1}{{\frac{1}{{13}} + \frac{1}{{18}}}} = ...\]

Answer 2

ok! so we get 19.248?

Answer 3

ok!

Answer 4

current is:
\[\Large I = \frac{V}{{{R_{TOTAL}}}} = \frac{{15}}{{19.25}} = ...\]

Answer 5

0.779?

Answer 6

ok!

Answer 7

voltage drops:
\[\Large \begin{gathered}
{V_1} = {R_1}I = 8.5 \times 0.78 = ... \hfill \\
{V_{AB}} = {R_{AB}}I = 7.55 \times 0.78 = ... \hfill \\
{V_4} = {R_4}I = 3.2 \times 0.78 = ... \hfill \\
\end{gathered} \]
where:
V_AB is the voltage drop across R_2 and the voltage drop across R_3

Answer 8

6.63
5.889
2.496

?

Answer 9

ok!

Answer 10

lowest would be R4? :/

Answer 11

that's right!

Answer 12

yay! thanks!!:)

Answer 13

:)