Question

You are given four resistors, 2 ohms, 3 ohms, 5 ohms, and 10 ohms. Your friend say you can connect them so you obtain an equivalent resistance of 5 ohms. Is what she says true or false?

Answer 1

If we will connect the resistors 2ohms, 3ohms, 5ohms in series and the 10ohms resistance parallel then we get equivalent resistance of 5 ohms.

The equivalent circuit is,

R equivalent for the series connection is,

`\begin{gathered} Req(S)=2+3+5=10ohms \\ Now,\text{ } \\ Req\text{ }for\text{ }10\text{ }ohms\text{ }and\text{ }10\text{ }ohms\text{ }is, \\ (1)/(Req)=(1)/(10)+(1)/(10)=(2)/(10)=(1)/(5) \\ So, \\ Req=5\text{ ohms} \end{gathered}`

The equivalent resistance is 5 ohms.

So your friend is saying true.