Question

Example. 3
One end of an aluminium wire, whose diameter
is 2.5 mm is welded to one end of a copper wire
whose diameter is 2.0 mm. The composite wire
carries a steady current 6.25 A. The current
densities in Al and Cu will be respectively
(A) 127 A/cm2, 200 A/cm2
(B) 126 A/cm2, 180 A/cm?
(C) 125 A/cm2, 160 A/cm2
(D) 125 A/cm, 180 A/cm2​

Answer 1

Answer:

C.125A/Cm2,160A/cm2