2. A silicon BJT is connected as shown in Figure 2. Assume that the absolute value of the base-emitter forward bias is 0.8 V, the current transfer ratio ß is 50, and the collector cut off
current ICEO is approximately zero. The power supply Vcc=15V. (20%)
(a) Compute the base current Ib and the collector current Ib. (10%)
(b) Compute the collector-emitter voltage VCE. (2%)
(c) What is the collector saturation current? (3%)
(d) Specify Rb1 to establish VCE=5V. (5%)
+Vec
Rb1
80 k2
500
Vce
Rb2
80 KO2
Figure 2​

What type of electromagnetic wave is used in security pens? a. x-rays c. microwaves b. visible light d. ultraviolet radiation select the best answer from the choices provided

Because air contracts as it cools, the air pressure inside a freezer is typically lower than on the outside. why do ice cubes inside a freezer tend to shrink over time? a. the ice dissolves oxygen from the air, forming a denser crystalline matrix. b. the ice reacts chemically with carbon dioxide in the air, forming gaseous carbon compounds. c. the ice melts, and then the liquid freezes as ice crystals on the bottom of the freezer. d. the ice sublimes, and then the water vapor deposits as ice crystals on the sides of the freezer.

A1-lb collar is attached to a spring and slides without friction along a circular rod in a vertical plane. the spring has an undeformed length of 5 in. and a constant k =25 lb/ft. knowing that the collar is released from being held at a determine, the speed of the collar and the normal force between the collar and the rod as the collar passes through b.