You have been given a Silicon-based BJT transistor with the leads labelled as shown in the figure: Plastic Body TO-92 1. Emitter 2. Base 3. Collector 123 Given that this transistor is either a PNP or NPN variant, create a step-by-step procedure for using a DMM with "diode check" feature to identify whether (a) it's an NPN or PNP (b) it's a PNP or NPN that has failed in some way (e.g. failed as open, or as a short)

4. A good resistor has a resistance reading with value A. lower than the minimum value. B. higher than the minimum value C. higher than the minimum value and lower than the maximum value. D. lower than the minimum value and higher than the maximum value. 5. Which component requires to be discharge before testing? C. resistor A. capacitor B. diode D. transistor

In RL load connected (without free transition diode), single phase, uncontrolled, full wave rectifier (4 diodes), the source voltage is sinusoidal and its effective value is 44Volt, 50 Hz. The ohmic load value connected to the circuit is 10 ohms. Average value of load current calculate. (L>>R) a) 4.16 A b) 3.46 A C) 3.26A d) 4.56 A e) 3.96 A

Answer the following questions (5x8=40 points) 1. What effect does the Zener diode resistance have on the voltage reference circuit operation?

Calculate the power rating of a zener diode connected across load working in reverse biased condition when the breakdown occurs at the current twice the test current, where VZ = 30 V, VZK =28.5V, IZK= 2mA, IZ= 10mA . Also calculate the minimum load resistance value with input voltage at Vs= 60 V and series resistance 450ohms.

Draw the characteristic curve of the standard PN-coupled semiconductor diode.Specify the correct and reverse polarity zones on the curve and draw the appropriate connection shapes.After mark the critical points on this curve and explain what these points mean.

Solve a and b

Under what conditions is the small signal model of a diode used in the analysis of a diode circuit!  

Sketch the pn junction energy band diagram in equilibrium (zero bias) showing the Fermi level as a flat horizontal line. Review the meaning of the Fermi level and position of Fermi level in p and n type semiconductors.

Npn with a β value of 100 in the circuit in the figurefor zener diodes used to drive the transistorGiven as VZ1=16.7 V and VZ2=5.6 V. Inanalysis of transistor operating point Circuitidentify by.(VBE=0.7 V )