Question

Find Net secured Resultance that can be secured by Combination of 3 resistors 5ohm, 6ohm ,2ohm connected in parallel?
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Answer 1

• R1=5ohm
• R2=6ohm
• R3=2ohm

We know

$\boxed{\sf \dfrac{1}{R}=\dfrac{1}{R_1}+\dfrac{1}{R_2}+\dfrac{1}{R_3}}$

$\\ \sf\longmapsto \dfrac{1}{R}=\dfrac{1}{5}+\dfrac{1}{6}+\dfrac{1}{2}$

$\\ \sf\longmapsto \dfrac{1}{R}=\dfrac{6+5+15}{30}$

$\\ \sf\longmapsto \dfrac{1}{R}=\dfrac{26}{30}$

$\\ \sf\longmapsto R=\dfrac{30}{26}$

$\\ \sf\longmapsto R=1.1\Omega$