Question

A wire f resistance 12 ohms per metre is bent to form a complete circle of radius 10 cm. The resistance between its two

Answer 1

since the wire is uniform therefore resistance per unit lenght would be same.

the resistance between two parallel ends would be

sum of parallel resistors of the two halves.

resistance of two halves=half of resistance of the whole

=12/2

=6 ohm

net resistance

1/R=1/6+1/6

1/R=1/3

R=3 ohm

Hope this helps