Question

physics Plz explain n share the picture of the sum
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Answer 1

Answer:

sorry but which sum ??

please send clearly

hope it helps.

thank you.....

....milamarloove.....

Answer 2

Answer:

Question

A wire of length 3 m and area of cross-section 1.7 × 10-6 m2 has a resistance 3 × 10-2 ohm.

a. What is the formula for resistivity of the wire and what is the unit of it.

b. Calculate the resistivity of the wire.

Explanation:

Solution

a. Resistivity of the wire is given by

ρ=RALρ=RAL

And It unit is Ohm-m

b. In this case

L=3 m

A=1.7×10−6A=1.7×10−6 m2

R=3×10−2R=3×10−2 ohm

So

ρ=1.7×10−8ρ=1.7×10−8 Ohm-m