Question

The resistance of a conducting wire X of length 1 m is 5 ohms. Calculate the resistance of the wire made by the same material whose length is 4 times and area of cross-section is 5 times that of wire X. (At same temperature)​

Answer 1

6.25

Explanation:

resistivity= resistance ×area ÷ length

= 5 × 5 ÷ 4

= 25 ÷ 4

= 6.25

the resistance of the wire = 6 25