Powerful Ohm's

In physics this week, we have been talking about an assortment of electricity-based topics. We learned that pretty much everything we use requires electricity to give it energy to work, and that electric energy powers stuff with currents of energy. This is where Ohm’s Law comes in. This law states that the current through a conductor between two points is directly proportional to the potential difference across to points. This is modeled in the equation: I=V/R.

Another thing we dove more in depth to this week is electric power.

Power (Watts) = Joules/second = current x voltage.

Power is defined as the rate at which energy is utilized. In other words, power is a sense of how energy efficient something is.

The picture below is of a compact fluorescent light bulb and an LED light blub. The LED blub is more energy efficient than the compact fluorescent bulb, because it uses less watts to do its thing. This means that it uses fewer joules per second, and has either a lower electric current or voltage than the compact bulb.