Question

calculate
the
the equivalent resistance
b/w point A nad B
on the
figure given below
WW
A
AMA
RI
B
R2
RI​

Answer 1

Answer:

The equivalent resistance between the points A and B is : RΩ.

Explanation:

This circuit forms a balanced Wheatstone bridge .

For series combination we use :

$\star \boxed{ \red{\bold{r_{eq} = r_1 + r_2 + r_3 + ......}}}$

For parallel combination we use :

$\star \boxed{ \bold{ \red{\frac{1}{r_{eq}} = \frac{1}{r_1} + \frac{1}{r_2} + \frac{1}{r_3} + ..}}}$

Solution refer to the attachment

Answer 2

Explanation:

The circuit forms Wheatstone bridge :

upper and lower becomes in series :

R1 = r+r = 2r

R2= r+r= 2r

And again both R1 and R2 comes in parallel combination :

1/R eq = 1/ R1+ 1/R2

1/R eq = 1/2r + 1/2r

1/R. eq =. 2/2r

1/ R eq = 1/r

R eq = r ohm