Inside a supeerconducting ring, six identical resistors each of resistance R are connected as shown in figure. The equivalent resistances.

Options

A. between 1 and 3 is zero.
B. between 1 and 3 is `R//2`
C. between 1 and 2, 2 and 3, 3 and 1 are all equal
D. between 1 and 2, 2 and 3 , 3 and 1 are all not equal.

Answer

A, C

Explanation

a., c.
Since 1,2, and 3 all at same potential so equivalent resistance
between 1 and 2, 2 and 3, 3 and 1 are all zero.