A transistor is said to be properly biased when emitter junction is forward biased and collector junction is reverse biased.
The total force applied per unit area is called pressure.
Mathematically,Pressure (P) = Force (F) / Area (A)
Its SI unit is pascal (Pa).
It is so because the speed of light (3 x 108 m/s) is much greater than the speed ofsound (332 m/s) in a gas. Thus, light reaches immediately and sound reaches later tothe earth's surface.
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