Electronics/physics

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Question
the resistance of a wire is R.it is bent at the middle by 180 and both the ends are twisted together to make a short wire.the resistance of the new wire is?

Answer
The resistance of wire is usually considered to be zero because even though the resistance is some very small amount it is negligible in most practical circuitry.

Their is resistance, however, and in the example you gave the length of the wire is reduced and the resulting resistance would be R - alpha where alpha is some small reduction due to the shorter distance between the two end points of the actual wire.

Hope this helps.  

Electronics

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Electronics questions about AC, DC and digital theory.

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Graduate electrical engineer with over 40 years in electronic design, manufacturing, project organization and patent review. Experience in fields of industrial and consumer electronics (audio, video, acoustics, etc.)

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IEEE (Institute of Electrical and Electronics Engineers); Senior Life member AES (Audio Engineering Society), Fellow Life member

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BSEE University of North Dakota

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