question_answer

A metal wire of resistance \[3\Omega \]is elongated to make a uniform wire of double its previous length. This new wire is now bent and the ends joined to make a circle. If two points on this circle make an angle 60° at the centre, the equivalent resistance between these two points will be :-       [JEE Main 9-4-2019 Afternoon]

A) \[\frac{12}{5}\Omega \]

B) \[\frac{5}{3}\Omega \]

C) \[\frac{5}{2}\Omega \]

D) \[\frac{7}{2}\Omega \]

Correct Answer: B

Solution :

[b]

(new resistance of wire)