Question

define the term watt and vlot. (1)a wire of length 3m and area of cross section is 1.7*10-6m2 has resistance 3*10-2ohm. (a) what is the formula for resistivity of the wire and what is the unit of it. (b) calculate the resistivity of the wire​

Answer 1

Watt- watt is defined as a unit of electrical power..

Volt - Volt is defined as the unit of measuring electrical force .

Answer 2

♡Answer♡

Formula of Resistivity (R) =

Resistance×Length/Area of Cross - Sec

Unit of Resistivity = Ohm metre

(b) Length of wire = 3m

Area = 17×10^-2m^2

Resistance of wire = 3×10^-6 Ohm

Resistivity = Area of Cross-Sec

---------------------------

Length

= 17×10^-6×3×10^-2

--------------------------

3

= 17×10^-4 Ohm metre

ThusResistivity of wire= 17×10^-4ohm m