Summary: Our voltage divider takes an input voltage (in this case 12 V , but it could be any value) and scales it down to create an output voltage that's 3 / 4 of the input voltage. The 3 / 4 ratio is …

Explore the voltage divider, a fundamental circuit pattern in electrical engineering, consisting of two series resistors that control output voltage. Master the voltage divider expression, which …

Learn what power means and how we use it to describe the rate of energy transfer.

I decided (arbitrarily) that voltage v i will be the input to our resistor function. We can assume input v i is generated by some voltage-making thing we're not showing. We assign the output to be …

These ideal mathematical abstractions of voltage sources can produce arbitrarily huge output current if the components they are connected to demand it. That doesn't happen in real life, of …

There isn't any magic here. It's just a turn of phrase. It means the same thing as saying the voltage at location x is the potential difference between x and infinity. This works because we …

It has two inputs, one is the plus input, one is the minus input, and it has an output, and it also has two power supplies to it. There's some sort of plus voltage that goes into it, and some sort of …

An op-amp can be used to amplify a voltage. The gain is determined by the ratio of two resistors.

For a real-world resistor there is of course a limit to the voltage and current. If the power (i ⋅ v) is more than the resistor can handle, it may change resistance value as it overheats, or even …

Let's explore the behaviour of output current (collector current Ic) as the output voltage (Vce) is changed in an NPN transistor.