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Exam Name___________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) The difference in energy levels that exists between the valence band and the conduction band is called 1) A) energy gap. B) […]

Exam Name___________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) The unity–gain frequency (fT) equals the product of mid–range voltage gain (AV(mid)) and the 1) A) compensating capacitance. B) load resistance. C) […]

24) Refer to the figure above. Low frequency response is affected by 24) A) CBE. B) RC. C) C3. D) All of the above. Answer: C Explanation: A) B) C) D) 25) If an amplifier has a voltage gain of […]

Exam Name___________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) Refer to (c) in the figure above. The symbol is for 1) A) a triac. B) a UJT. C) a diac. D) […]

Exam Name___________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) Refer to the figure above. Which circuit is a voltage follower? 1) A) (a) B) (b) C) (c) D) None of the […]

26) If an op–amp were perfect, the CMRR would 26) A) be zero. B) approach infinity. C) be very small. D) be less than one. Answer: B Explanation: A) B) C) D) 27) The closed–loop voltage gain of an inverting […]

Exam Name___________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) The ________ circuit overcomes the problem of false switching caused by noise on the input(s). 1) A) differentiator B) Schmitt trigger C) […]

26) Hysteresis voltage is defined as 26) A) the voltage of the lower trigger point. B) the difference in voltage between the upper and the lower trigger points. C) the voltage of the upper trigger point. D) the sum of […]

Exam Name___________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) The output of a peak detector is always 1) A) equal to the min value of the peak level received since the […]

23) Refer to (d) in the figure above. If gm= 25 mS and RL= 25 k, the voltage gain would be 23) A) 62.5. B) 6.25. C) 625. D) Not enough information is given. Answer: C Explanation: A) B) C) […]

Exam Name___________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) Refer to the figure above. Which of these circuits is known as a Hartley oscillator? 1) A) (a) B) (b) C) (c) […]

18) Refer to the figure above. To reduce the duty cycle to less than 50%, which of the following circuit changes would be necessary? 18) A) Increase the size of R1. B) Connect a diode in parallel with R2. C) […]

Exam Name___________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) Switching regulators have ________ than linear regulators. 1) A) simpler circuitry B) more heat–sinking requirements C) greater efficiency D) lower efficiency Answer: […]

25) The LM317 regulator provides a(n) 25) A) adjustable negative output voltage. B) fixed negative output voltage. C) fixed positive output voltage. D) adjustable positive output voltage. Answer: D Explanation: A) B) C) D) 26) A voltage regulator with a […]

Exam Name___________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) The graphic shown below is a block diagram for an automated test system. Block 2 represents the 1) A) switching control. B) […]

Exam Name___________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) The IF amplifiers within an FM radio receiver are tuned to 1) A) 455 kHz. B) 4.55 MHz. C) 100.7 MHz. D) […]

Exam Name___________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) Refer to the figure above. The probable trouble, if any, indicated by these voltages is 1) A) an open transformer primary. B) […]

31) With a half–wave rectified voltage across a load resistor, load current exists for what part of a cycle? 31) A) 0 degrees B) 90 degrees C) 360 degrees D) 180 degrees Answer: D Explanation: A) B) C) D) 32) […]

Exam Name___________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) A varactor is a diode that 1) A) varies its resistance with temperature. B) changes its capacitance with voltage. C) emits light […]

28) If the load resistance decreases in a zener regulator, the series current 28) A) stays the same. B) equals the source voltage divided by the series resistance. C) decreases. D) increases. Answer: A Explanation: A) B) C) D) 29) […]

Exam Name___________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) When transistors are used in digital circuits they usually operate in the 1) A) linear region. B) saturation and cutoff regions. C) […]

25) A transistor collector characteristic curve is a graph showing 25) A) collector current (IC) versus collector–emitter voltage (VCE) for specified values of base current (IB). B) collector current (IC) versus collector–emitter voltage (VCC) for specified values of base current […]

Exam Name___________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) If the collector resistor decreases to zero in a base–biased circuit, the load line will become 1) A) useless. B) flat. C) […]

18) Refer to (b) in the figure above. The most probable cause of trouble, if any, from these voltage measurements is 18) A) the base–emitter junction is open. B) a short from collector to emitter. C) RE is open. D) […]

Exam Name___________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) The input resistance of the base of an emitter follower is usually 1) A) high. B) shorted to ground. C) low. D) […]

26) Which of the following is not a characteristic of the emitter–follower? 26) A) Low output impedance B) Voltage gain of 1 C) Low input impedance D) High current gain Answer: C Explanation: A) B) C) D) 27) Removing a […]

Exam Name___________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) Refer to the figure above. The combination of the two transistors is called 1) A) complementary. B) NPN. C) PNP. D) same. […]

26) Refer to the figure above. The purpose for the diodes D1 and D2 is 26) A) to maintain constant bias with temperature changes. B) to allow the correct bias voltages on the two bases. C) to apply equal signals […]

Exam Name___________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) The easiest way to bias a JFET in the ohmic region is with 1) A) gate bias. B) self–bias. C) voltage–divider bias. […]

24) Special handling precautions should be taken when working with MOSFETs. Which of the following is not one of these precautions? 24) A) MOSFET devices should have their leads shorted together for shipment and storage. B) All test equipment should […]

Exam Name___________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) How much dc voltage should always be measured at the gate of a common–gate amplifier? 1) A) +VDD B) +VDD 2 C) […]

26) Which of the following is not an application of an analog MOSFET switch? 26) A) Analog multiplexer B) Sample–and–hold circuit C) Inverter D) Switched capacitor circuit Answer: C Explanation: A) B) C) D) 27) Refer to the figure above. […]