Question

A 6ohm resister is doubled on itself what is its new resistance..?? BOARD QUESTION

Answer 1

Answer:

double by length or by area

if the resistance is doubled by length then the resistance will be 2 times of previous and if by area reasistance will be half

Answer 2

Given :

R=6ohms

R=ρl/A-------------(1)

Wire is doubled so, Area =A=2A

length=l=l/2

New Reistance will be:

Rnew=ρ(l/2)/2A

Rnew=ρl/4A

Rnew=R/4-----(from equ 1)

Rnew=6/4=1.5 ohms

Hence new Reistance of wire is 1.5ohms.

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