Growing up I usually had a little 50 in one or 100 in one electronics project kit.
Keeps all the stuff on one kit, and you connect wires under little springs. Still adult supervision required for sure, but on the upper range of what’s possible.
The fundamental concept at work in making an electromagnet is Lenz’s law. Here’s a Khan academy video on the topic. www.youtube.com/watch?v=xxZenoBs2Pg
You can determine the power of a magnet (very roughly) using the following equation:
B = μ₀ * n * I
Where:
B is the magnetic field strength in teslas (T) or gauss (G). μ₀ is the permeability of free space, approximately equal to 4π × 10^-7 T·m/A. n is the number of turns per unit length of the coil (turns per meter). I is the current flowing through the coil in amperes (A).
So the number of turns matters, and also the current matters.
But there’s a third thing, and I think that’s the problem you’re having: This piece of wire is conductive, and the nail is conductive, and there doesn’t seem to be any insulation on the wire. Because of that, the current flows through the wire on one side, into the nail and across it, then out the wire on the other side. The current needs to flow in loops without being able to take any other path, The coil of wire and the current flowing around in circles is what’s required.
What you want is a long piece of wire with insulation on it. Then you wrap it around the nail, and then apply a battery across the wire. A 1.5V battery probably won’t have much punch so you might not be able to get much of a magnet, but a 9V battery should do it quite well. What will happen is the current flowing through the wire will create a magnetic field, which will magnetize the nail, which will create a magnet you can use to pick up coins.
A lot of the time, people run demos using special wire for creating magnets that’s copper with a very thin clear insulating coating on it, so you might think you’re looking at someone just making a loop of regular wire, but the insulation is key to the whole thing working.
It was pretty clear to me, that’s why I stopped going.
It was getting toxic a long while back, but I was ok with that – I just deleted my account every few months so I wouldn’t get doxxed. But then I started to realize 2 things: First, many subreddits wouldn’t even let you post without a minimum amount of karma. Second, many subreddits would downvote you into oblivion for any sort of wrongthink.
Don’t get me wrong, I know I’m a wierdo and I have some bad takes sometimes, but you put bad takes out there to put them in the fire and then you get to see they’re bad or you hammer them until they’re good. But in the echo chamber, there was only one answer: Obey.
Are you familiar with the Salem witch trials, the werewolf trials in France in the 1500s and 1600s and the Satanic Panic of the late 80s and early 90s? Those people thought they were morally justified in anything they did against the accused because they were fighting against literal Satan.
World War 2 ended 75 years ago. Virtually everyone who was a Nazi is dead of old age.
“No nazis or bigots” is a nice slogan, but if people turn off our brains and turn off our humanity and just start mindlessly chanting slogans that justify the punishing of our enemies, then there’s no difference between us and the typical German in 1938.
It doesn’t take a lot to end up in a bad place if we think we’re purely good and in the right and our enemy is purely evil.