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. DIY Galvanometer | ThinkTac
Measuring the current and voltage in a circuit, or across components in a circuit, is vital to carrying out a host of experiments. The fundamental instrument used for doing so is called a Galvanometer, named after the famous Italian scientist Luigi Galvani, a pioneer in the field of electricity more than 200 years ago.
In this TACtivity, we use copper wire, a container and other household items to make your very own galvanometer: a toothpick that distinctly deflects when a current is passed through the coil.
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#206_EM_BuildSimpleGalvanometer
Nice model. Every single step has explained by you.
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will there be a problem if we use a normal cylindrical magnet instead of a ring magnet??
ring magnet is preferred, but you can use both if you need it for demonstration purposes, which should be the case. just make sure to align it properly. the "arrow" should be sticking out of the North pole
You may use any magnet. Just be sure to know which surfaces of the magnet are the poles, and orientate it appropriately based on that
Kya ye class 12 standard ka h?
9th or 10th, depending on the board. But you can upscale it to 11th-12th or even college students. Everyone uses these concepts in their E&M classes...
Sir l followed all the steps but its not showing deflection. Please tell me what could have gone wrong.
Is this a tangent galvanometer
In some sense, yes, because the coil doesn't move and the magnet does. But we don't pay heed to the Earth's magnetic field in this TACtivity. The magnetic field generated by the current is quite a bit stronger, at that distance, than the Earth's magnetic field, so it doesn't play much of a role, unlike in typical tangent galvanometers
Does it work if I don't use a battery and insert a magnet into the coil? I'm making a galvanometer for my electromagnetic induction experiment.
I don't think that it will...
It's not that precise . Putting magnet into coil doesn't induct that much current so I think it will not deflect needle
The purpose of a galvanometer is to detect current flow, i.e. to measure either current or voltage. A battery has been used here as a current source to show that when it is connect to the galvanometer, the needle deflects. Using a magnet to show another magnet deflects is what a compass does, but isn't what a galvanometer is used for.
You have asked about induction. In which case, either the inserted magnet or the coil itself has to be moving with respect to the other. Only then can you induce current. If you can make such a set-up and connect it to the galvanometer, then yes, technically you should be able to see a deflection then too. But engineering something like that may be a challenge.
Sir can you make needle magnet galvanometer please please 🥺
will it work if i have joined my copper wires instead of continous wire
just make sure to insulate it properly to prevent short circuits and you good to go
Yes, you may connect it directly too. Just scrape them adequately.
Op
Very nice..
Very good
Sir iska aim btado
Theres a lot ofgalva what kind of galva is this
A simple galvanometer where the coil is stationary.
Supr
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What if I use North pole and south pole magnet
All magnets have a N and S pole, so I don't exactly understand your question. The ring magnet is small, light and because of the central hole can easily be attached here. Hence we use it. Theoretically, you can use any magnet
🖤
Thank you for watching. Please continue to share your feedback.
How many guage is the copper wire??
35 gauge
I need a quick answer pls
If the terminals of the battery (+ve and -ve) are changed and touched in the copper coil, the needle deflects and shows the opposite direction. Why it happens so?
because the direction of the current is changed.. it flows in the opposite direction
this is why we use galvanometer- it can detect both +ve and -ve charges currents whereas an ammeter can only do one sided..
That's right; direction of the current flips, so the direction of the magnetic field caused due to the current flowing in the wire also flips and so deflects in the opposite direction when interacting with the permanent magnet.
Is is only galvanometer or moving coil galvanometer? Pls rply its urgent
In our galvanometer, the magnet moves. The coil is stationary. So it's not a moving coil galvanometer. In most commercial designs, or in your text book, they refer to moving coil galvanometers. The function of both is of course the same. Just that our design is different and ingenious
Can you please explain how does it work???
Any current carrying wire produces a magnetic field; nothing but Oersted's Law. So, in this case, as current passes through a coil, a magnetic field is produced, which then deflects the permanent magnet and the amount by which it deflects effectively tells you the current in the coil or the amount of voltage it generates