Use the formula $R _ { t } = \frac { R _ { 1 } R _ { 2 } } { R _ { 1 } + R _ { 2 } }$ to find the total resistance $\left( R _ { t } \right)$ if one resistance $\left( R _ { 1 } \right)$ is 15 ohms and the second resistance $\left( R _ { 2 } \right)$ is 10 ohms.
A)0.17 ohms
B)5 ohms
C)6 ohms
D)1 ohms

Question

Quizplus · Accepted Answer

Plugging in the given values into the formula, we get:
$$R_t=\frac{15\cdot10}{15+10}=\frac{150}{25}=6	ext{ ohms}$$

Use the Formula Rt=R1R2R1+R2R _ { t } = \frac { R _ { 1 } R _ { 2 } } { R _ { 1 } + R _ { 2 } }Rt​=R1​+R2​R1​R2​​

Use the Formula $R _ { t } = \frac { R _ { 1 } R _ { 2 } } { R _ { 1 } + R _ { 2 } }$