Question

6.If the length of a wire is doubled and its cross-section is also doubled then the resistance will​

Answer 1

Answer:

Since the increase in length cancels out the increase in cross sectional area, The resistance remains unchanged.

Resistance=

A

ρL

Here ρ is the resistivity of the wire.

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Answer 2

Explanation:

Explanation:As per basic equation of resistance, value of resistance is directly proportional to length & inversely proportional to area. Hence if both length & cross-sectional area are doubled the value of resistance will remain the same as that of earlier value. That's all! A wire has a resistance of 10 ohms.

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