Shini explores electric current, voltaic cells, and how we get electric charge. ... Let's start with the fact that power is a function of current through, and voltage across, a resistor.

In a lab in Oxford University's experimental psychology department, researcher Roi Cohen Kadosh is testing an intriguing treatment: He is sending low-dose electric current through the brains of ...

This means that for the LED to turn on, the current can only go one way—from the positive side through to the negative side. We can use this to show the connection between electric field and ...