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

Question 132

Multiple Choice

Use the formula 1R=1R1+1R2\frac { 1 } { R } = \frac { 1 } { R _ { 1 } } + \frac { 1 } { R _ { 2 } } . Given R=14ΩR = 14 \Omega and R2=21ΩR _ { 2 } = 21 \Omega . Find R1R _ { 1 } .


A) R1=35ΩR _ { 1 } = 35 \Omega
B) R1=45ΩR _ { 1 } = 45 \Omega
C) R1=42ΩR _ { 1 } = 42 \Omega
D) R1=37ΩR _ { 1 } = 37 \Omega
E) R1=40ΩR _ { 1 } = 40 \Omega

Correct Answer:

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