Q.

Inside a superconducting ring, six identical resistors each of resistance R are connected as shown in figure. The equivalent resistance(s) 

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a

between 1 and 3 is zero

b

between 1 and 2, 2 and 3, 3 and 1 are all equal

c

between 1 and 2, 2 and 3, 3 and 1 are all not equal

d

between 1 and 3 is R/2       

answer is A, C.

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Detailed Solution

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.

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