Question

who's resistivity is 1.1×
${10}^{ - 6}$
​

Answer 1

Answer:

Explanation:

A copper wire has diameter 0.5 mm and resistivity of 1.6 × 10 −8 Ω m. What will be the length of this wire to make its resistance 10 Ω? How much does the resistance change if the diameter is doubled? Ans: Area of cross-section of the wire, A =π (d/2) 2 Diameter= 0.5 mm = 0.0005 m Resistance, R = 10 Ω