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Physical and Electrical Background
Electronics isdened as the scientic study of the behavior and design of elec-
tronic devices and circuits, based on some fundamental physical and electrical
denitions.
2.1 FORCE, WORK, ENERGY, POWER
The (mechanical) force
refers to any (physical) cause
capable of modifying the condition of constant speed of
a body (note that even a stationary body has a constant
speed, equal to zero), or of deforming it.
The SI unit of force is the Newton [N] (Sir Isaac Newton,
an English physicist, mathematician, astronomer, natu-
ral philosopher, alchemist, and theologian, 1642–1727,
Figure2.1).
A force
acting on a ...