Question

The electrical resistivity of a copper wire of length 0.1 km and radius 0.5 mm is 1.7 x 10-8 Ωm . The

electrical resistivity of the same wire when its length is doubled and area of cross section is half will be

( Given: R= 2.16Ω)
(a) 1.7 x 10-8 Ωm (b) 6.8 x 10-8 Ωm (c) 0.425 x 10-8 Ωm (d) 0.84 x 10-8 Ωm​

Answer 1

Answer:

b is correct please mark me as brainlist