# 3 resistors having resistances of 20ohm ,20ohm and 15ohm are connected i parallel . what is the effective resistance in the circuot

There are two different questions in your posted question

I am preferring the question which you have texted. For other questions please repost it in different thread

Hope it will help you. Looking forward to hear from you again

$Weknowthatinparallelcombination\phantom{\rule{0ex}{0ex}}\phantom{\rule{0ex}{0ex}}\frac{1}{{R}_{eq}}=\frac{1}{{R}_{1}}+\frac{1}{{R}_{2}}+\frac{1}{{R}_{3}}\phantom{\rule{0ex}{0ex}}\phantom{\rule{0ex}{0ex}}\phantom{\rule{0ex}{0ex}}=\frac{1}{{R}_{eq}}=\frac{1}{20}+\frac{1}{20}+\frac{1}{15}\phantom{\rule{0ex}{0ex}}\phantom{\rule{0ex}{0ex}}=\frac{1}{{R}_{eq}}=\frac{3+3+4}{60}\phantom{\rule{0ex}{0ex}}\phantom{\rule{0ex}{0ex}}=\frac{1}{{R}_{eq}}=\frac{10}{60}\phantom{\rule{0ex}{0ex}}\phantom{\rule{0ex}{0ex}}\phantom{\rule{0ex}{0ex}}={R}_{eq}=\frac{60}{10}=6\Omega \phantom{\rule{0ex}{0ex}}$

Regards

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