education

A coil consists of 2000 turns of copper wire having a cross-sectional area of 0.8mm square. The mean length per turns is 80cm and the resistivity of copper is 0.02micro meter. Find the resistance of the coil and power absorbed by the coil when connected across 110v d.c supply.

A coil consists of 2,000 turns of copper wire having a cross-sectional area of 0.8 mm2. The mean length per turn is 80 cm, and the resistivity of copper is 0.02 µ Ω-m. Find the resistance of the coil.

Solution:

Length of the coil, L= Number of turns × mean length per turn

= 2,000 × 0.8 = 1,600 m

Cross-sectional area of wire, a = 0.8 mm2 = 0.8 × 10-6 m2

Resistivity of copper, ρ = 0.02 µΩ-m = 2 × 10-2 × 10-6 Ω-m = 2 × 10-8Ω-m

Current = V/R

Resistance of the coil, R = l/a = 2 × 10-8 × 1,600 / 0.8 × 10-6 = 40 Ω Ans.


Power = voltage × current
= V × I
Current = V/R
= 110/40
= 2.75A
P= 2.75×110
= 302.5W

Check Answer for resistance is 40 ohms
Power = 302.5W

Oluwamuyide Peter

My name is seyi, the main aim of creating this platform is to help users get information like school updates, electrical engineering topics, school project and many more for free

Related Articles

29 Comments

  1. Do you have a spam problem on this blog; I also am a blogger, and I was curious about your situation; we have developed some nice methods and we are looking to trade strategies with other folks, why not shoot me an email if interested.

  2. I’ve been exploring for a little for any high quality articles or blog posts on this sort of space . Exploring in Yahoo I ultimately stumbled upon this web site. Studying this information So i am happy to express that I have an incredibly just right uncanny feeling I found out just what I needed. I such a lot for sure will make sure to don’t overlook this web site and provides it a glance on a continuing basis.

  3. Thanks for all of the hard work on this web page. Betty delights in conducting research and it’s simple to grasp why. Most of us hear all regarding the dynamic ways you create powerful tricks through your web site and recommend participation from website visitors on that theme so our simple princess is undoubtedly discovering a lot of things. Have fun with the remaining portion of the year. You are performing a stunning job.

  4. You really make it seem so easy with your presentation but I find this matter to
    be actually something which I think I would never understand.
    It seems too complicated and very broad for me. I’m looking
    forward for your next post, I will try to get the hang of
    it!

  5. Hi, I do think this is a great site. I stumbledupon it 😉 I may revisit yet again since i have book marked it.
    Money and freedom is the best way to change, may
    you be rich and continue to help other people.

  6. Youre so cool! I dont suppose Ive learn anything like this before. So nice to find someone with some original thoughts on this subject. realy thank you for beginning this up. this website is one thing that’s needed on the web, somebody with a bit originality. helpful job for bringing one thing new to the web!

  7. May I simply just say what a relief to discover somebody that truly knows what they are talking about online. You definitely know how to bring a problem to light and make it important. More and more people must read this and understand this side of your story. I can’t believe you’re not more popular because you definitely have the gift.

Leave a Reply

Back to top button