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

question 30

Multiple Choice

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

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Definitions:

Inheritance

The process by which genetic information is passed on from parents to their offspring, determining certain characteristics of the offspring.

Live-virus Vaccines

Vaccines that contain a version of the living virus that has been weakened so that it does not cause the disease in people with normal immune systems.

Weakened Viruses

Viruses that have been attenuated (reduced in virulence) for use in vaccines, allowing the immune system to develop immunity without causing the disease.

Immune Response

The body's defensive reaction to foreign substances or organisms, involving recognition and destruction.