[" What will be the resistance of a metal wire of length "2" metres and area of cross-s "],[1.55times10^(-6)m^(2)" ,if the resistivity of the metal be "2.8times10^(-8)Omega" m? "]

(a) Write down an expression for the resistance of a metallic wire in terms of the resistivity. (b) What will be the resistance of metal wire of length 2 metres and ares of cross-section 1.55 xx 10^(-6)m^(2) , if the resistivity of the metal be 2.8 xx 10^(-8) Omega m ?

Calculate the resistance of a metal wire of length 2 m and area of cross section 1·55 xx 10^(-6) m^(2) , if the resistivity of the metal be 2·8 xx 10^(-8) Omega m ?

Resistance of a metal wire of length 2 m is 40 ohm. If the diameter of the wire is 0.3 mm. What will be the resistivity of the metal at that temperature?

The resistance of a wire of length 80 cm and of uniform area of cross-section 0.025 cm^2 , is found to be 1.50 ohm. Calculate the resistivity of the wire.

Resistance of a metal wire of length 1 m is 26 Omega at 20^@ C . If the diameter of the wire is 0.3 mm , what will be the resistivity of the metal at that temperature ? .

A nichrome wire of length 100 cm and area of cross-section 0.5 m m^(2) has a resistance of 2.2 Omega . The resistivity of nichrome is

The resistance of a conductor of length x is r. If its area of cross section is a, what is its resistivity? What is its unit?