Negative resistance
Negative resistance is like a weird kind of resistance. Let's think of resistance like a hill that we have to climb. Normally when we climb a hill it gets harder and harder as we go up. That's like resistance where it gets harder and harder to move things through a wire as we push more electricity through it.
But with negative resistance, it's like the hill gets easier to climb the more we go up! That doesn't make sense, right? It's like magic!
Actually, it's not magic. It happens in some special materials that are called "non-ohmic." Usually, when we push electricity through a wire, it creates heat and resistance. But in these non-ohmic materials, some weird things happen that cause the electricity to actually flow EASIER when we push more of it through.
This might not seem very useful, but it actually is! We can use negative resistance to create something called an oscillator, which is like a little box that creates a signal that goes back and forth really fast. We use oscillators in things like radios, TVs, and even some medical equipment!
So even though negative resistance might seem like magic, it's actually just a special property of certain materials that we can use to create really cool things!
But with negative resistance, it's like the hill gets easier to climb the more we go up! That doesn't make sense, right? It's like magic!
Actually, it's not magic. It happens in some special materials that are called "non-ohmic." Usually, when we push electricity through a wire, it creates heat and resistance. But in these non-ohmic materials, some weird things happen that cause the electricity to actually flow EASIER when we push more of it through.
This might not seem very useful, but it actually is! We can use negative resistance to create something called an oscillator, which is like a little box that creates a signal that goes back and forth really fast. We use oscillators in things like radios, TVs, and even some medical equipment!
So even though negative resistance might seem like magic, it's actually just a special property of certain materials that we can use to create really cool things!