Question

A wire of resistance 20Ω is bent to form a closed square. What is the resistance across a diagonal of the square?​

Answer 1

Answer:

7 ohm

Explanation:

let suppose

length = 12 cm(0.12 m)

resistivity = 0.0171 ohm

radius of wire = 0.1 cm

area of wire = 0.0314 cm^2(0.000000314 m^2)

p = r * l/a

= 0.0171 * 0.12/0.000000314

= 6535 ohm

let length of wire = 0.03 m

= 0.0171 * 0.03/0.000000314

= 1633 ohm

1633 * 4 = 6533