Question

A wire of resistance 20 ohm is bend in the form of circle . What is the effective resistance between two point at the end of any diameter of the circle.???????

Answer 1

if they formed circle than they formed parallel circuit and devide into 2 part and both resistance 10 so
effective R= (r1×r2) /r1+r2
R=(10×10)/10+10
R=100/20=5ohm
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