Question

I’m stuck on this help please ?!

Answer 1

`color(red)(2/3 V)`

Explanation:

We have to find the potential difference between X and Y

Given to us is the circuit....
In parallel connection, potential to both branches is the same.

Using ohm's law...

`color(blue)(V=IR`

potential at X
`V=IR`
some potential would have been dropped because of first `5 Omega` resistor,,, if we calculate that drop and subtract it from `2` we get potential at X

Now, since all resistors are of `5Omega`, we get nice symmetry..

Each resistor would decrease potential by `2/3` (because there are three `5Omega` resistors connected in series in each branch..

So potential at X would be
`2-2/3=4/3`

and at Y
`2-2*2/3=2/3`

`V_(X-Y)=4/3-2/3=2/3V`