Why the greater the diameter of the wire used in household, greater the maximum current that can safely be carried by the wire. Whether the maximum permissible current depends on the length of the wire? Whether the maximum permissible current depends on the kind of material used.

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Chapter 26, Problem 16DQ

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Why the greater the diameter of the wire used in household, greater the maximum current that can safely be carried by the wire. Whether the maximum permissible current depends on the length of the wire? Whether the maximum permissible current depends on the kind of material used.

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