Question

A wire of resistance 5ohm is bent to form a square.What is the equivalent resistance in ohm across the diagonally opposite vertices of the square?

Answer 1

WHEN IT WILL BENDED TO FORM SQUARE
SO, THE LENGTH WILL BECOME HALF
THERE FORE THE RESISTANCE WILL ALSO BECOME HALF .
THE 2 WIRES FROM OPPOSITE VERTICES WILL BE IN PARALLEL.
SO, 1/R = 1/5 +1/5
1/R = 2/5
R = 2.5 ohm

Answer 2

Is the answer 1.25ohm
Since all around the sides there will be 1.25 ohm so, accross the diagonals 2.5 ohm will be in parallel. So the ans must be 1.25 ohm