Question

we have a copper wire of resistance R this wire spool so that its length is the world temperature remains constant find the new resistance of the wire in the terms of its original resistance​

Answer 1

Answer:

According to Ohm's law, current in the circuit is proportional to the voltage.

R = ρl/A,

where ρ is considered resistivity of the material.

Let

R1 = ρL/A and

R2 = ρ.2L/(A/2) =4.

ρL/A = 4R1.

Therefore, the new resistance of the conductor is four times the original resistance.