Question

It's Ans is 10.8 V.Ans this with explanation please!!

Answer 1

heya.......


---Answer:

The potential difference is =3.69V

----Explanation: 

We apply the equation

U=RI

E−U=rI

E=(R+r)I

The emf is E=2⋅1.9=3.8V

The cells are in series-parallel and the internal resistances as well.

The total resistance is

r+R=(12+12)+18=19Ω

The current is

I=3.919=0.21A

So, the potential difference is

=U=18⋅0.21=3.69V

 so ur option answer is wrong dude...i hope it will help u..

tysm....@gozmit

Answer 2

Hey mate!

Here's your answer!!

The potential difference is = 3.69V

Explanation:
We apply the equation,

U = RI
E - U = rI
E = (R + r) I

The emf is E = 2• 1.9 = 3.8V

The cells are in series-parallel and the internal resistances as well.

The total resistance is,
$r + r = \frac{1}{2} + \frac{1}{2} + 18 = 19$
The current is,
$i \: = \frac{3.9}{19} = 0.21a$
So, the potential difference is,
= U = 18• 0.21 = 3.69V.

$hope \: it \: helps \: you.$
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