a) Write down an expression for the resistance of a metallic wire in terms of resistivity.
b) What will be the resistance of the metal wire of length 2m and area of cross-section  1.55 x 10-6 m2, if the resistivity of the metal is 2.88 x 10-8  ohm m?


a) The resistance of a metallic wire in terms of resistivity is:

R=Aρl

Where ρ is the resistivity and A is the area of cross-section.

b) Given: The resistance of the metal wire of length 2m and area of cross-section  1.55 x 10-6 mand the resistivity of the metal is 2.88 x 10-8  ohm m.

To find: We have to find the resistance of the metal wire.

Solution: We know that 



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Updated on: 10-Oct-2022

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