Question

if we change the length of a resistor to 40cm,what will be the resisatnce of the conductor(old R=6ohm,Length old=10cm)?

Answer 1

This is short method...

For explanation refer below question....

https://brainly.in/question/14841698?

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Answer 2

Resistance = ρl/A

Where, ρ = resistivity of wire

l = Length of wite

A = Area of cross section of wire

So, If we change Length by 4 times then Length will be 4 times and resistivity and Area of cross section will not be affected.

So, New resistance = ρ(4l)/A

New resistance = 4 × ( ρl/A)

New resistance = 4 × Resitance

New resistance = 4 × 6

New resistance = 24 ohm

Therefore, Resitance will be 24 ohm when Length is changed to 40cm.

Hope it helps.......✌