Question

an aluminium wire has diameter 0.5 mm and resistivity 2.8 into 10 to the power minus 6 ohm cm. how much length of its wire is required to make a 10 ohm wire​

Answer 1

Answer:

7008cm

Explanation

Explanation in attached pic

May it helps you

Answer 2

Answer:

192.608

Explanation:

radius = 0.25mm = 0.025cm

Row = 2.8 ×10^6

R =10 ohm

we know that

$r = (row \times l) \div a$

10 = 2.8 ×10^-6 × l /( pie ×0.025 square)

By simplifying

L = 192.608 M