Question

What is resistance of wire which is divided in square with resistance is 20ohm

Answer 1

Ur question is not fully clear as u

have not mentioned, between which

points the eq. Resistance to be find.

Now,when a resistor of 20ohm is

made square, all four sides have

5ohm resistance of each.

If we have to find the eq.resistance

between diagonal then

Ek,resistance two consecutive sides will be in series I.e 5+5=10ohm

And the new. Of opposite sides are in

parallel I.e 1/Req=1/10+1/10
=>R eq.=5 ohm.