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

question 183

Multiple Choice

Use the formula $\frac { 1 } { R } = \frac { 1 } { R _ { 1 } } + \frac { 1 } { R _ { 2 } }$ . Given R = 12 ? and $R _ { 2 }$ = 36 ?. Find $R _ { 1 }$ .

• A) \(R _ { 1 } = 18 \Omega\)
• B) \(R _ { 1 } = 19 \Omega\)
• C) \(R _ { 1 } = 16 \Omega\)
• D) \(R _ { 1 } = 21 \Omega\)
• E) \(R _ { 1 } = 9 \Omega\)

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