Electrical engineering is now divided into a wide range of fields, including computer engineering, power engineering, telecommunications, radio-frequency engineering, signal processing, instrumentation, and electronics. Many of these disciplines overlap with other engineering branches, spanning a huge number of specializations including hardware engineering, power electronics, electromagnetics and waves, microwave engineering, nanotechnology, electrochemistry, renewable energies, mechatronics, and electrical materials science. See glossary of electrical and electronics engineering.

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When a vector of a certain magnitude and direction is divided by magnitude of a vector the result is vector unit length at angle degrees. (Diagram 22.1,2 page 273 of engineering mathematics by John bird PDF attached below. Scalar product of 2 vectors are outlined on page 238 on fig 22.4,22.5,22.6 Angle between vectors uses cos. follow examples on problem 3,4,5 on john bird. For further understanding try the exercise 97 on page 241
Electrical PRINCIPLE notes
Communication skills

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