Go Back   Physics Help Forum > High School and Pre-University Physics Help > Electricity and Magnetism

Electricity and Magnetism Electricity and Magnetism Physics Help Forum

Like Tree1Likes
Reply
 
LinkBack Thread Tools Display Modes
Old Nov 23rd 2017, 07:14 PM   #31
Senior Member
 
Join Date: Apr 2017
Posts: 177
Originally Posted by yafimski View Post
Hi oz93666,

Sadly I am in the Netherlands. Only bikes here :/
I don't have somewhere to get a car battery, but I also didn't find one on ebay/amazon when I searched.

Can you recommend a place to buy one online...?
I did live in The Netherlands for a few years many cars everywhere ... and many shops selling car batteries , scrap yards with old batteries ...

Cannot buy lead acid battery online , postage would cost more than the battery!!

But if you don't already have access to a car battery , maybe forget that idea.

It really would help if you gave more details of what you want to do , it could probably be powered directly with mains electricity (230V)...

Last edited by oz93666; Nov 23rd 2017 at 07:16 PM.
oz93666 is online now   Reply With Quote
Old Nov 24th 2017, 12:20 AM   #32
Junior Member
 
Join Date: Sep 2017
Posts: 23
Dear oz93666,

I am attaching a photo to better describe what I wish to achieve as the experiment. The trial I made so far involved the nail, copper coil, and simple 9v battery, which turned out way too weak.

Does this help to figure out which power supply I need...?


Thanks!
Attached Thumbnails
Neodymium magnet and electromagnet experiment-img_20171124_081519.jpg  
yafimski is offline   Reply With Quote
Old Nov 24th 2017, 04:46 AM   #33
Senior Member
 
Join Date: Apr 2017
Posts: 177
Originally Posted by yafimski View Post
Dear oz93666,

I am attaching a photo to better describe what I wish to achieve as the experiment. The trial I made so far involved the nail, copper coil, and simple 9v battery, which turned out way too weak.

Does this help to figure out which power supply I need...?


Thanks!
Thanks...I'm a little clearer ... you want to achieve some movement in a ring magnet ... My first comment is the coil needs to be much bigger . put "solenoid coil " in ebay and you'll find many , this one is 2 euros ...



or this one 3 euros ...it takes only 0.25 A .. possible with small domestic batteries ...it has many hundreds or perhaps thousands of turns in the coil...It would be very difficult , more expensive and time consuming for you to make one yourself that will produce the same effect


Last edited by oz93666; Nov 24th 2017 at 04:50 AM.
oz93666 is online now   Reply With Quote
Old Nov 24th 2017, 11:18 AM   #34
Junior Member
 
Join Date: Sep 2017
Posts: 23
Thanks!
I found these:

coil 1

coil 2

coil 3


which one would you recommend for the biggest effect?
yafimski is offline   Reply With Quote
Old Nov 24th 2017, 06:34 PM   #35
Senior Member
 
Join Date: Apr 2017
Posts: 177
coil 1 is $2.34 free postage ..
coil 2 is $15 +46 postage (rule #1 ,never buy from US postage is a joke)
coil 3 is $15 + $25 postage

Since you are just experimenting I would suggest you buy perhaps 3 of the cheapest coils , coil 2 and 3 are not better quality,

coil 1 looks fine , I would get that , and a few others types for 2/3 euros each ...

You need to also think about power ...surely you have an old laptop charger , or a charger for an electric drill these would be perfect to try with the ebay coils.... any sort of charger
oz93666 is online now   Reply With Quote
Old Nov 25th 2017, 01:54 AM   #36
Junior Member
 
Join Date: Sep 2017
Posts: 23
Thanks! I'm ordering them

About the charging, can you explain what's the connection sequence of these elements? Maybe a quick sketch of how the charger should connect to the coil..? Or maybe it's a straight forward +/-.

Also - do I still need a nail to get it electromagnetic enough in order to effect the neomagnet?
yafimski is offline   Reply With Quote
Old Nov 25th 2017, 04:05 AM   #37
Senior Member
 
Join Date: Apr 2017
Posts: 177
just plug the charger strait into the coil ...it would help to buy a multimeter , then you can see what amps and voltage you have ...another 4or 5 euros from ebay ....I you probably don't need the nail , depending on the coil design ...

oz93666 is online now   Reply With Quote
Old Nov 25th 2017, 05:40 AM   #38
Junior Member
 
Join Date: Sep 2017
Posts: 23
Thanks a lot! Will update with results!
yafimski is offline   Reply With Quote
Old Jan 13th 2018, 08:01 AM   #39
Junior Member
 
Join Date: Sep 2017
Posts: 23
Hi,
Sorry to ask these simple questions again but I'm not sure what to do.

I have the 'coil 1' I mentioned in the above posts. It's a tiny solenoid with DC12V on it.

I tried to attach the coil to the +/- of the battery and just bring it close to the magnet but it didn't differ from my previous trial - meaning the magnet just doesn't seem to be affected by the coil's magnetic field.

The battery I used is still the 9v.
Should I split an old laptop charge's cable and connect it to the wall?

Thanks
yafimski is offline   Reply With Quote
Old Jan 26th 2018, 11:48 AM   #40
Junior Member
 
Join Date: Sep 2017
Posts: 23
oz93666

Do you mean I should split the end of a laptop charger, attach the solenoid to it and plug it into the wall?

Isn't that dangerous...?

Thanks
yafimski is offline   Reply With Quote
Reply

  Physics Help Forum > High School and Pre-University Physics Help > Electricity and Magnetism

Tags
electromagnet, experiment, magnet, neodymium



Thread Tools
Display Modes


Similar Physics Forum Discussions
Thread Thread Starter Forum Replies Last Post
How is electricity produced by a electromagnet? avito009 Advanced Electricity and Magnetism 5 Mar 9th 2017 06:20 AM
Electromagnet working RRitesh Electricity and Magnetism 0 Jul 8th 2016 06:43 AM
Electromagnet actuator increase power project Electricity and Magnetism 1 May 2nd 2016 09:11 AM
Electromagnet to attract small iron pieces hackhard Electricity and Magnetism 2 Jul 26th 2015 10:30 PM
Field Strength in an Electromagnet aybeesee Advanced Electricity and Magnetism 1 Mar 10th 2009 11:09 AM


Facebook Twitter Google+ RSS Feed