Question

Factors affecting resistance and resistivity xam idea

Answer 1

Hello Friends,

Factors affecting the resistance of a conductor are :
(i). Length of conductor.
                                     The resistance is directly proportional to length.
(ii). Area of cross-section of conductor.
                                      The resistance is inversely proportional to area of                                                         cross-section of conductor.
(iii). Temperature of conductor.
                                      Resistance increases with increase in temperature                                                         and decreases with decrease in temperature.
(iv). Nature of conductor.
                                      Resistance also depends upon the nature of                                                                   conductor.
                                      e.g. If we take two wire of same length and area, of                                                       copper metal and nichrome alloy, then the                                                                      resistance of nichrome wire will be 60 times more                                                          than the copper wire.

Factors affecting resistivity of conductor:
                                       The resistivity of a substance does not depend upon                                                      the length or thickness of conductor.
                                       It depends upon the nature and temperature of                                                               substance.

_________________________________________________________
               Don't forget to mark as brainliest and hit thanks button