Which of the following properties make(s) aluminium suitable for use as overhead electric cables? I aluminium is a good conductor of electricity II aluminium has a low density III aluminium has a low tensile strength AI, II and IIIBI and II only CII and III only DI only
Question
Which of the following properties make(s) aluminium suitable for use as overhead electric cables? I aluminium is a good conductor of electricity II aluminium has a low density III aluminium has a low tensile strength AI, II and IIIBI and II only CII and III only DI only
Solution
To determine which properties make aluminium suitable for use as overhead electric cables, we need to analyze the given options.
Option I states that aluminium is a good conductor of electricity. This property is indeed true for aluminium. It has a high electrical conductivity, which allows for efficient transmission of electricity through the cables.
Option II mentions that aluminium has a low density. This property is also true for aluminium. Its low density makes the cables lightweight, which is beneficial for overhead installations. It reduces the strain on supporting structures and makes installation easier.
Option III states that aluminium has a low tensile strength. This property is not desirable for overhead electric cables. Cables need to withstand tension and stress without breaking. Therefore, a low tensile strength would make aluminium less suitable for this purpose.
Based on the analysis, we can conclude that options I and II are correct, while option III is not. Therefore, the correct answer is AI and II only.
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