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describe the factor on which resistivity of resistant depend. |
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Answer» .1) Length of the conductor Resistance is directly proportional to the length of conductor..2)Area of cross section of the conductor The resistance of a conductor is inversely proportional to the area of cross section..3)Nature of the material..4)Temperature The resistance of metal increase with rise in temperature. Resistance of a conductor directly depends upon Length of the wire LInversely depends upon Area of Cross section of the conductor 1/ANature of material used.Therefore, R=ρ L/ALength of the conductor is double, means you are stretching that given length to double it. As a result, the wire becomes thin due to stretching. So its area of cross section will be halved(Since the volume remains constant). So new resistance RN = ρ 2L/A/2 = 4. ρ.L/A =4RHence the new resistance will become 4 times. Length, area, nature of material , temp. Of conductor |
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