Physics, asked by shahzanprince786, 7 months ago

how does the resistivity of wire change when its lenght ia doubled?​

Answers

Answered by shinchan2419
0

Answer:

Resistance of wire increases by four times.

Explanation:

Resistance of wire is proportional to length and inversely proportional to area.

Area′×Length=Volume

⟹Area=V/L​

Volume of wire is always constant.

As length is doubled,

Area×(2L)=V

⟹Area=V/2L​⇒ Area is halved.

So, R1​=​ρL1​​/A1

⟹R2​=ρ(2L)​/(A/2​)=4ρL/A​

Resistance of wire increases by four times.

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Answered by omsingh020304
0

Answer:

will be four times

Explanation:

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