2. The amplifier circuit shown below uses a silicon transistor. The capacitors C_C and C_E can be assumed to be short at signal frequency and the effect of output resistance r_0 can be ignored. If C_E is disconnected from the circuit, which one of the following statements is TRUE?

3. When a current source I is suddenly connected across a two terminal relaxed RC circuit at time t = 0, the voltage across the current source is shown in figure. The RC circuit is ______.

4. All but which one of the following statements regarding extrinsic semiconducting silicon is true?

5. In an ac circuit, what can be the maximum and minimum values of power factor?

6. For all resistor wattage ratings except 1/8 watt, what is the maximum allowable change in resistance for a 1000-hour rated load life test?

7. Si transistor of the following figure has a α = 0.9 and I_CE = 0, V_EE = 5 V and Vcc = 13 V, then R_E will be ____ if I_EQ = 1 mA.

8. What is the rms value of the wave shown in the figure?

9. The 'h' parameters of the circuit shown in the figure are h_ib = 25 Ω, h_fb = 0.999 and h_ob = 10¯⁶ Ω. What is the voltage gain?

10. If the cross-sectional area of a magnetic field increases, but the flux remains the same, the flux density _______.

11. The figure shows the self-bias circuit for CE amplifier and its equivalent circuit. What are V_BB and R_B respectively?

12. An RLC series circuit is underdamped. To make it overdamped, the value of R ______.

13. In the circuit shown below, the silicon npn transistor Q has a very high value of β. What is the required value of R2 in kΩ to produce Ic = 1 mA?

14. In an R-C series circuit excited by a voltage E, the charge across capacitor at t = 0^+ is ______

15. To prevent a DC return between source and load, it is necessary to use _______.

16. A capacitor terminology that refers to minute and rapid fluctuations of capacitance?

17. In figure shown, v1 = 8 V and v2 = 4 V. Which diode will conduct?

18. In figure shown, what is the current supplied by battery immediately after switching on the circuit?

19. The drift velocity of electrons is ______.

20. If the steel disk in a crankshaft position sensor has stopped with the tab in the magnet's air gap, the induced voltage ______.

21. In a CE amplifier the input impedance is equal to the ratio of _______.

22. For the circuit shown below, different time constants are given:

1. 0.5 x 10¯³ s

2. 2 x 10¯³ s

3. 0.25 x 10¯³ s

4. 10¯³ s

What are the charging and discharging times respectively?

23. In figure shown, what is the saturation collector current?

24. What if you have a 12-strand conductor and each strand has a radius (one-half the diameter) of 2/10 inch, what is the square mil area of the conductor?

25. What is the time constant of the circuit in figure shown?

2. In the experiment shown:

2. 2. Which of the following statements is false?

3. 3. The capacitors C₁, C₃, C₄ and C₅ have a capacitance of 4 μF each and the capacitor C₂ has a capacitance of 10 μF. What will be the effective capacitance (in μF) between the points X and Y?

4. The surface charge density on a conductor is 1.55 x 10¯⁹ C/m². The conductor is immersed in water with ε = 78ε_0. What will be the electric field?

5. As an externally generated magnetic field through a certain conducting loop increases in magnitude, the field produced at points inside the loop by the current induced in the loop must be:

6. The JFET in the circuit shown in figure has an I_DSS = 10 mA and Vp = -5 V. What is the value of the resistance Rs for a drain current I_DS = 6.4 mA?

7. The output characteristics of a FET closely resemble the output characteristic of a _________valve.

8. What is the best location for setting a Q-point on dc load line of an FET amplifier?

9. In the circuit shown in the given figure, the diode states at the extremely large negative values of the input voltage vi are:

10. The figure below shows a center-tap circuit having the load resistance and transformer turn ratio given. The primary is connected to 230 V, 50 Hz supply. Find the d.c. output voltage

11. The small variation in the output voltage of a dc power supply is called _____.

12. During the positive half-cycle of the input voltage in a bridge rectifier,

13. What is the damping coefficient for the given circuit below?

14. What is the resonant frequency of the circuit shown in the figure?

15. When a diode in a center–tapped rectifier opens, the output is

16. In the following transistor circuit V_BE = 0. 7 V, r_c = 25mV/I_E, and β and the capacitance are very large. What is ap proximately the mid-band voltage gain of the amplifier?

17. The bridge rectifier shown below uses silicon diodes. Find the d.c. output voltage and d.c. output current. Use simplified model for the diodes

18. Reverse saturation current in a silicon PN junction diode nearly doubles for every ____ degree rise in temperature.

19. What capacitor has a low temperature coefficient of capacitance and good stability with temperature and frequency making this a good choice for critical precision circuitry such as filter applications?

20. As an externally generated magnetic field through a certain conducting loop increases in magnitude, the field produced at points inside the loop by the current induced in the loop must be:

21. Find the voltage across 64 Ω resistor for the circuit shown below.

22. In the infinite ladder circuit as shown above each resistance of r Ω then find R_AB.

23. What resistor type is unsuited for use above 50 kHz?

24. The process of changing a half-wave rectified voltage to a constant voltage is called ____.

25. If both the plate area and the plate separation of a parallel-plate capacitor are doubled, the capacitance is: