Topic: Elementary Electrical Engineeering

Instructions: Show your solutions in a sheet of paper (handwritten) and express your answers in proper units.

2.2 Charge, Current. 1tt-nltage. and Power 15. The total charge owing out of one end of a small copper wire and into an unknown device is determined to follow die relationship (fl!) = S's\"Q C. where r is expressed in seconds. Calculate the current owing into the de'vrice1 taking note of die sign. 16. The current owing into the collector lead of a certain bipolar junction transistor {BIT} is measured to he 1 HA. If no charge was transferred in or out of the collector lead prior to t = . and the current ows for l min. calculate the total charge which crosses into the collector. 26. Determine the power absorbed by each of the elements in Fig. 2.29. 1 pA + 1 V - O O 2 A 10 V I Q 10 mA- 6 V 2 A (a) (b) (c) Activ Go to S FIGURE 2.29 Elements for Exer. 26.36. To protect an expensive circuit component from being delivered too much power, you decide to incorporate a fast-blowing fuse into the design. Knowing that the circuit component is connected to 12 V, its minimum power consumption is 12 W, and the maximum power it can safely dissipate is I W, which of the three available fuse ratings should you select: 1 A, 4 A, or II] A? Explain your answer. 40. (a) Sketch the current-voltage relationship (current on the y-axis) of a 2 kS resistor over the voltage range of -10 V