Question

11 A wire of resistance 12 ohms per meter is bent to form a
complete circle of radius 10 cm. The resistance between
its two diametrically opposite points, A and B as shown
in the figure is
(a) 3 Ω
(b) 6 2
(c) 692
(d) 0.60 22
cm and 3 cm. Ratio of
IB
A​

Answer 1

Explanation:

Total resistance of wire = 12Ω×2π×10

−1

= 2.4π

Resistance of each half =

2

2.4π

=1.2π

and as about diameter both parts are in parallel

Req. =

2

1.2π

=0.6πΩ