Electrical engineers study electronics, electricity, and electromagnetism. They create and manufacture generators, radar, lighting systems, and other electrionic equiptment. The basic circutry relies on the principles of Ohm's law, the power law, and Kirchhoff's voltage and current laws, relating power, resistance, current and voltage. Electrical engineering also requires creativity and problem solving to bring hypothetical ideas and concepts to life.
Biomedical engineering combines biology and medicine with engineering by making inventions that have medical uses and can safely be used in or in conjunciton with the body. Some examples are artificial limbs and organs, treatment delivery systems, and monitoring systems.
Computer scientists design various parts of computers and accecories ranging from wiring the hardware to programming the software. From printers to keyboards, computer science is the reason for much of the advanced technology that exists today. Computer scientists also need a foundation of electrical engineering to design the hardware and they create products that can help scientists and engineers in all fields.
To learn more about different types of engineering: http://typesofengineering.org/