The effective resistance between points P and Q of the electrical circuit shown in the figure is (a) `(2Rr)/(R+r)` (b)`(8R(R+r))

The effective resistance between points P and Q of the
electrical circuit shown in the figure is
(a) `(2Rr)/(R+r)`
(b)`(8R(R+r))/(3R +r)`
(c) `2r + 4R`
(d) `(5R)/2 + 2r` .

.
A. `(2Rr)/(R+r)`
B. `(2R(R+r))/(3R+r)`
C. `2r+4R`
D. `(5R)/2+2r`

The effective resistance between points P and Q of the electrical circuit shown in the figure is (a) `(2Rr)/(R+r)` (b)`(8R(R+r))/(3R +r)` (c) `2r + 4R

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