what are the factors affecting resistivity of a conductor ?

Factors on which the resistivity of a wire depends are-

1. Length of the wire

2. Area of cross -section of wire

3. Nature of the wire (material)

4. Temperature of the conductor

Factors affecting resistance are followings [R= (ρl/A)]

(i)Larger the length, higher the value of resistance of wire.

(ii) Lesser the resistivity of the material of wire, lesser is the resistance of the wire. i.e. resistance depends on the nature of the material.

(iii) The resistance of a wire is inversely proportional to the cross-sectional area of the wire.

FACTORS AFFECTING RESISTIVITY OF A CONDUCTOR

1-length of the conductor

2-area of cross section (thickness)

3-nature of the material with which the conductor build 

Resistance depends on-

• Temperature
• Material of conductor
• Length 
• Cross-sectional area

thnx everyone

Resistance is the property of a component which restricts the flow of electric current. In this page, we are going to discuss about the factors affecting resistance. The resistance of a conductor is affected by the following factors:

• Length of the conductor
• Area of cross section of the conductor
• Electrical Resistivity of Substances
• Effect of Temperature

thnx

i ) Cross-sectional area of the wire.
Reistance is inversely proportional to the area of cross-section of the wire. More the cross-sectional area, easier it is for the electrons and hence charge to flow and hence more current and less resistance.

ii) Length of the wire.
Resistance is directly proportional to the length of the wire.
More the length of the wire, longer is the distance to be covered by the electrons and hence charge thereby reducing current and increasing resistance.

iii)  Temperature. Higher temperature results in higher resistance.
Higher the temperature, faster will be the oscillations of the ions in the conductor and the moving electrons will have to undergo more number of collisions per unit length of the wire, thereby reducing time between successive collisions and reducing drift velocity of the electrons which results in less current and higher resistance

iv)  Material of the conductor
Some materials like metals are better conductors of electricity and offer less resistance to the flow of current. Non-metals have poor conductivity. Conductivity of charge in metals is mainly due to the free electrons in the outer orbits of metals.

welcome

hmmm

FACTORS AFFECTING RESISTANCE

=> length of conductor.(when length increase it increase).length is directly proportional to it.

=> area of cross section.(area of cross increase it reduce).length Inversely proportional to it.

=> nature of conductor.

FACTORS AFFECTING RESISTANCE

=> length of conductor.(when length increase it increase).length is directly proportional to it.
=> area of cross section.(area of cross increase it reduce).length Inversely proportional to it.
=> nature of conductor.