Question

Electrical Resistivity of a given metallic wire depends upon

1)its length

2)its thickness

3)nature of the material

4)All of the above

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Answer 1

Answer:

resistivity depends upon the nature of the material

Answer 2

$\\ \bigstar\large\underline{ \orange{{ \pmb{ \frak{Required \: Answer : - }}}}}$

• 4) All of the above

$\\\bigstar\large\underline{ \orange{{ \pmb{ \frak{Resistivity:- }}}}}$

$\leadsto\underline { \boxed{ \pink{{ \sf R = \rho \frac{L}{A} }} }} \bigstar$

• where, R, L,A and ρ represents Resistance, length, Cross sectional area and Resistivity (pronounce as rho) of conductor.
• The electrical resistivity of material is it's natural resistance towards the current.
• it is directly proportional to the length of the wire. Resistivity increases as the length increases and vice versa.
• it is inversely proportional to the cross sectional area (thickness) of the wire. It increases if area decreases and vice versa.
• it is directly proportional to temperature. When temperature increases, resistivity also increases and vice versa.

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hope its helpful :"D