Free help with homework

Why join Brainly?

  • ask questions about your assignment
  • get answers with explanations
  • find similar questions

A wire has resistance of 8 ohm . If its length is made half by folding, find its resistance after the free ends are connected to each other?



Resistance R = 8 ohm
let's take length as L
and cross section area as A

here we need to use the formula R= rho(L/A)
here rho (as i didn't find the Greek symbol for it) stands for resistivity

as length is halved and r the radius is increased by two
R is reduced to R/4=8/4=2 ohm

so new resistance will be  2 ohm
1 4 1
The Brain
  • The Brain
  • Helper
Not sure about the answer?
Learn more with Brainly!
Having trouble with your homework?
Get free help!
  • 80% of questions are answered in under 10 minutes
  • Answers come with explanations, so that you can learn
  • Answer quality is ensured by our experts