Physics, 27.08.2019 00:30 Brainly264

Atungsten wire has resistance r at 20°c. a second tungsten wire at 20°c has twice the length and half the cross-sectional area of the first wire. in terms of r, the resistance of the second wire is
(1)r/2
(2)2r
(3)r
(4)4r

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Atungsten wire has resistance r at 20°c. a second tungsten wire at 20°c has twice the length and hal...