The low voltage developed is due to the subtractive polarities of emf induced in two opposite side of the coil. They tend to cancel out each other, however they're unequal so there's a small potential available at the voltmeter terminals
@@northwestrockgem9745 Nahh...... permeability of any material means....the magnetic capacity of any material i.e. amount of magnetic intensity a material can create... ✌🏻
@@northwestrockgem9745 permeability mean: paramagnetic ( non conductive magnetism) or diamagnetic ( conductive magnetism). The magnetic flux can trougth the material or can be deflected.
The magnetic field of the magnet is inducing the coil, producing an electrical current of micro amps. Power plants work on this principle. Jesus bless you (Camaragibe-PE, Brazil
I wouldn’t call that an experiment, I would call it a demonstration. You understand the phenomenon, you are demonstrating it. An experiment is when you are testing a hypothesis and you don’t know what the outcome will be.
I think I can call it a demo and expt both since we used different nails(thickness to control the resistance), changed the length of the wire means number of coils multiple times and different ampermetre to see the deflection, finally it worked!
You should use a material with high permeability in the core so that all the flux lines go through it. Air is the weakest conductor of magnetic flux. Then you should rapidly move the magnet to and fro from the coil. You’ll get a higher deflection.
The change in the magnetic flux is too little mostly because you are moving the magnet OUTSIDE of the coil. In a perfect experiment this would produce NO current. The only current you are producing here is due to experimental error and arrangement imperfections, against the magnetic flux law. You should put a little magnet INSIDE the coil.
In addition, when you enter inside the coil you should rotate the magnet (in the video the magnet has the wrong orientation), in such way that the magnetic field change in the same direction of the coil axis in order to maximize the change of the magnetic flux
I dont think its an experimental error after the calibration, the magnet I am using is very powerful, weak magnet did not induced measurable current, and in addition ...less number of turns were not helpful either!
Would you perform the experiment again with: -Nth side of magnet facing wire -Sth " " " " " -magnet edge facing wire (edge is the plane of inertia and centripetal)
that was very inefficient… just coil that wire around the nail, attache to your microammeter and bring the magnet rapidly towards and away from the nail.
Dear sir, more emf and hence current would be produced if you keep the magnet in your hand vertical and not horizontal. I am an electrical engineer, I request you to consider this once. Thanks.
Thank you for taking time and writing comment Nidhi, this setup is for my students and unfortunately they don't understand Hindi, so I had no option, I am not based in India! Thank you again anyway for taking time and commenting.
Два конца цепи подключены к двум разъёмам амперметра. Других концов ни у цепи, ни у амперметра нет. Как их по-другому подключить друг к другу? Вроде вариантов нет.
@@deepakkapoor081 I agreed with Ismail. Moving the magnet along the coil didn’t change the total flux inside. Therefore it won’t produce a strong emf. Instead of using a small magnet, have you thought about using a larger coil instead. I used the school standard coil, I can produce a deflection at least 20 times more than yours. Just my two cents.
@@manla8397 sure I can try that, what do you mean by school standard coil? And the magnet I used was pretty strong ! But sure thanks , I will definitely try as soon as back to school!
@@deepakkapoor081 schools usually have some standard equipment for demonstrations. One of them are induction coil. The coil diameter is about 5cm. They are quite robust and can be used for many different experiments. For example IEC produces a lot of scientific equipment and exports them over the world. When you slid the magnet along the coil, the total magnetic flux inside the coil did not change much. In fact I suspect the current was produced by the unsteady hand movement rather the horizontal movement along the coil. You may find some videos in RU-vid about induction and see how much deflection (micoamps) they made. BTW where did you get your ring magnet? I retrieved a few from microwave ovens but not as large as yours.
