I am starting a course in Sept in electrical installation. As it's been a while since I left full time education I thought I would buy the relevant text book to give me a head start and get my brain into gear.(adsbygoogle = window.adsbygoogle || []).push({});

My problem relates to parallel circuit calculation!

Example: three resistors of 16, 24, and 48 ohms are connected across a 240v supply find the the total resistance. I know that it's 8 ohms because it tells me so. What I don't understand is how that is arrived at.

the equation is shown like this:

1/Rt= 1/R1+1/R2+1/R3 = 1/16 + 1/24 + 1/48

and therefore:

1/Rt = 3+2+1/48 = 6/48

I realise that 48/6 =8 what I don't get is what does 1 represent and where does 48 come from as in: 3+2+1/48

There is no explination of how the calculation is done!

2. Relevant equations

3. The attempt at a solution

1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

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# Homework Help: Parallel circuit equation question

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