Current Electricity 1 Question 16
16. The effective resistance between points $P$ and $Q$ of the electrical circuit shown in the figure is
(2002, 2M)
(a) $\frac{2 R r}{R+r}$
(b) $\frac{8 R(R+r)}{3 R+r}$
(c) $2 r+4 R$
(d) $\frac{5 R}{2}+2 r$
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Solution:
- The circuit can be redrawn as follows :
