Review the components of a circuit and their symbols such as battery, resistor, and switch. Analyze how the power of a resistor is related to the current and electric potential difference across the resistor.

Generating technologies for deriving electrical power from the ocean include tidal power, wave power, ocean thermal energy conversion, ocean currents, ocean winds and salinity gradients. Of these, the three most well-developed...

Lord Kelvin (William Thomson) developed electrostatic theory and a range of novel and interesting electrostatic apparatuses. Described here is a reconstruction of a water dropper electrostatic generator. It's capable of generating...