Tagged Questions
1
vote
1answer
115 views
Amperian loop to measure solenoid's magnetic field
My textbook proves the formula \$B =\mu_0In \$ for a solenoid by taking a rectangular Amperian loop as shown here:
The problem I see with this though is that it only takes into account the ...
0
votes
1answer
178 views
magnetic field outside solenoid
It is written in our course book that the magnetic field outside a solenoid is negligible and almost zero. Why is it negligible? Is it negligible compared to the field inside solenoid or is it nearly ...
7
votes
0answers
203 views
Differences between a planar coil and coplanar waveguide to create a local 1D AC magnetic field
Coplanar waveguides (for example picture look here) are often used in research to create a local in-plane magnetic field. Now if compared to a planar microcoil like this,
driven by a AC voltage in ...
3
votes
3answers
390 views
How to convert a three wire hall effect sensor to a 2 wire sensor?
Would there be any possibility to convert a three-wire hallsensor to a 2-wire equivalent.
The connections are a V+, GDD and OUT.
The voltage between V+ & GDD would be 24V and the OUT port would ...
2
votes
1answer
115 views
Automobile ignition coil (spark coil)
Question: How is this possible to get 1:1000 electric potential scale while primary/secondary loop scale is only about 1:100?
2
votes
1answer
170 views
Controlling temperature of a water bath with induction plate
I am thinking of building a sous-vide cooker using some kind of prebuild heater, controled via an AVR and temperature sensor like the LM35. There are a lot of references around using rice cookers, ...
0
votes
1answer
206 views
Building a coil for galvo motor
I'm building myown galvo motors and for that I need some coils that I'll have to build myself to fit into the dimensions I need.
Is there any technique for winding the wire or is it just straight ...
3
votes
2answers
207 views
Sending data over a magnetic field
I need to find a way to trigger this Hall Effect Sensor with a non-permanent magnet. Does anyone know if an inductor's magnetic field would be strong enough? Or am I going to have to build an ...
4
votes
1answer
97 views
Fine-grained sensing of distance between two permanent magnets
(disclaimer: bit of an electronics newbie here)
I have a bunch of little magnet ball-bearings that I was playing around with the other day. I formed them into a strand, then fixed both ends leaving ...
7
votes
2answers
284 views
Using the audio input port as a voltmeter
I'm a physics undergraduate currently studying electromagnetism. I have no experience at all with playing with electronics. I'm trying to see the effect of a changing magnetic field on a closed ...
1
vote
1answer
341 views
Do diamagnetic material exhibit induction?
Silly question perhaps, but do metals with the property of diamagnetism also exhibit inductance? Would a fluctuating magnetic field induce a current in a diamagnetic metal?
