The LED in Figure shown requires 30 mA to emit a sufficient level of light. For the following circuit values, determine the resistance of RC and the amplitude of the square wave input voltage necessary to make sure that the transistor is in Saturation. [VCC= 9 V, VCE(sat) = 0.2 V, RB = 3.3kQ, BDC= 50, and VLED= 1.8 V] RC (in ohm) Vn = ..( in volt) respectively +Voc 233, 2.7 133,2.5 220,3 1000,5 ON ON RB OFF Re

TEST Read the question carefully. Write the letter for each correct answer in the blank space provided. A 1. Maximum power is delivered from a source of power to a load when the a. load current is equal to the power source current b. impedance of the load is equal to the output impedance of the power source c. output impedance of the power source is high compared to the impedance of the load d. output impedance of the power source is low compared to the impedance of the load 2. The emitter follower is a (an) a. impedance matching device b. high gain voltage amplifier c. phase inverter d. combination power and voltage amplifier 3. The emitter follower uses a. no collector resistor b. a forward bias collector-base junction c. negative feedback (degeneration) d. an NPN transistor only 4. The emitter follower has output resistance. a. high, high b. low, low c. low, high d. high, low input resistance and 5. The current gain of an emitter follower is a. less than 1 b. equal to 1 c. greater…

In a Bread Board, the rows are shorted or the columns are shorted? The BJT is operated in The Zener diode may have a breakdown voltage from about mode. Transistor has doped regions. Which one is the full form of DMM? In forward region Zener diode Clipper Circuits When the diode is connected across a voltage source with positive polarity of source connected to P side of diode and negative polarity to N side, then the diode is in A rectifier converts an In Full-wave bridge rectifier how many diodes are needed? condition. signal into a signal.

2. sketch io and Vot for the notwork below for the input shown (Bßoth diodes are Si, Vo= 0,7v), 20V Vo! Vi -20 V 5.3U 7.3V

What are the properties of a circle D-mosfet in the subject of field effect transistor

%3D For the circuit shown in Figure B23, a = 0.97, calculate the following: i. Collector current (Ic) ii. Collector-Base voltage (VCB) iii. Emitter Current (IE) iv. Base Current (IB) IE Ic 2.5 k2 Ouput 2.8V IB 10V VEE Vcc Figure B23

Q.7 Light-emitting diode (LED) is simply a diode that is designed to emit light. Voltage drop for LED is 0.8V. What happens to the LED when it is connected to the voltage source as in Figure A1? Why? (Describe in terms of majority carrier movement). LED 5V 1kQ Figure Al

State whether the followings statements are true or false.3.1.1 The process of adding impurities to an intrinsic (pure) semiconductor toincrease and control conductivity is called forward bias.3.1.2 A varactor diode acts as a variable capacitor under reverse biasedcondition.3.1.3 Hole is the presence of electron in the valence band of an atom. 3.1.4 The output voltage of the bridge rectifier is twice the total secondaryvoltage.

A half-wave rectifier circuit provides 100 mA (dc) to a 5-KO load resistance. Calculate the output dc voltage and diode PIV rating for this circuit.