Question

wire is folded and doubled upon itself from centre.what is percentage change in its resistance​

Answer 1

Answer:

25%

Explanation:

in this case , length will become half and area of cross section will become double and when u put this in formula I will get that it decreases by 25%

Answer 2

The percentage change in its resistance​ is 25%.

Explanation:

• The wire folded and doubled upon itself from the center and percentage changes in its resistance.
• The resistance is the inversely proportional to the cross sectional area. The lower in the radius will also lower the resistance.
• The radius is decreased by 4 times here. Hence the percentage change in resistance is much lower when the folded and double.
• If doubled the resistance obtained is 4 times. The resistance is defined as obstacle to current flowing in the system.
• It manages the flow of current in smooth manner.

To know more:

A 6 ohm resistance wire is doubled by folding. what is the new resistanne?

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