Question

17. A copper wire has diameter 0.5 mm and resistivity of 1.6 x 10–ohm. What will be the length
wire to make its resistance 10 ohms​

Answer 1

Answer:

31.25

Step-by-step explanation:

R=p×L/A

L=Ra/p

$l = 10 \times \ \frac{0.5}{1.6 \times 10 { }^{ - 1} } \\ = 5 \times 10 \div 1.6 = 31.25$

Answer 2

You can further calculate it by simple calculations...