Question

the resistance of a conductor wire x of length one metre is 5 homes calculate the resistance of the wire made by a material whose length is 4 times and area of cross section is five times that of wire x ​

Answer 1

Answer:

case 1

length=x

area=A

resistivity=row

R=row×x/A=5

case 2

l=4x

A=5A

resistivity=row

R=4/5×row×x/A

=4/5x5=4 ohm