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Use the Formula 1R=1R1+1R2\frac { 1 } { R } = \frac { 1 } { R _ { 1 } } + \frac { 1 } { R _ { 2 } }

Question 183

Multiple Choice

Use the formula 1R=1R1+1R2\frac { 1 } { R } = \frac { 1 } { R _ { 1 } } + \frac { 1 } { R _ { 2 } } . Given R = 12 ? and R2R _ { 2 } = 36 ?. Find R1R _ { 1 } .


A) R1=18ΩR _ { 1 } = 18 \Omega
B) R1=19ΩR _ { 1 } = 19 \Omega
C) R1=16ΩR _ { 1 } = 16 \Omega
D) R1=21ΩR _ { 1 } = 21 \Omega
E) R1=9ΩR _ { 1 } = 9 \Omega

Correct Answer:

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