Posted by Physics fail on .
Four resistors each of resistance 4 Ù are connected to form a square loop. What is the equivalent resistance between two points on its diagonal AC or BD?
AD
 
BC
That's what it looks like on my homework. Thank you in advance

Physics 
Elena,
R1=R(AD)+R(DC)=4+4= 8Ω
R2=R(AB)+R(BC)= 4+4= 8Ω
1/R =1/R1 +1/R2= 1/8 + 1/8= 2/8= 1/4
R= 4 Ω