The purpose of emitter capacitor (i.e. capacitor across RE) is to ______________?

Related Mcqs:

1. A series resonant band-stop filter consists of a 68 Ω resistor, a 110 mH coil, and a 0.02 µF capacitor. The internal resistance, RW, of the coil is 4 Ω. Input voltage is 200 mV. Output voltage is taken across the coil and capacitor in series. What is the output voltage magnitude at f0?

   A. 1.1 mV
   B. 11.1 mV
   C. 111 mV
   D. 200 mV

2. A parallel resonant band-pass filter consists of a 6.8 Ω resistor in series with a parallel network made up of an 8 µH coil and a 120 pF capacitor. The output is taken across the capacitor/coil. Assume RW = 0 Ω. What is the center frequency of the filter?

   A. 5.14 MHz
   B. 514 kHz
   C. 5.03 MHz
   D. 503 kHz

3. An RC low-pass filter consists of a 120 Ω resistor and a 0.002 µF capacitor. The output is taken across the capacitor. The circuit’s critical frequency is___________?

   A. 333 kHz
   B. 633 kHz
   C. 331 kHz
   D. 60 kHz

4. A parallel resonant band-pass filter consists of a 90 Ω resistor in series with a parallel network made up of a 60 mH coil and a 0.02 µF capacitor. The output is taken across the capacitor/coil. The coil winding has a resistance of 20 Ω. What is the center frequency of the filter?

   A. 459 Hz
   B. 4,591 Hz
   C. 999 Hz
   D. 2,176 Hz

5. A 5 μF capacitor has a potential difference across its plates of 200 volts. The charge on the capacitor is____________?

   A. 2.5 x 10-8 C
   B. 10-5 C
   C. 103 C
   D. 4 x 103 C

6. The value of emitter capacitor CE in a multistage amplifier is about____________?

   A. 1 µF
   B. 100 pF
   C. 0.01 µF
   D. 50 µF

7. The purpose of resistance in the emitter circuit of a transistor amplifier is to _________________?

   A. Limit the maximum emitter current
   B. Provide base-emitter bias
   C. Limit the change in emitter current
   D. None of the above

8. The input capacitor in an amplifier is the______________ capacitor?

   A. Coupling
   B. Bypass
   C. Leakage
   D. None of the above

9. The purpose of a coupling capacitor in a transistor amplifier is to ___________________?

   A. Increase the output impedance of transistor
   B. Protect the transistor
   C. Pass a.c. and block d.c.
   D. Provide biasing

10. An RC high-pass filter consists of a 0.2 µF capacitor and a 220 Ω resistor. The output is taken across the resistor. The circuit’s critical frequency is_____________?

    A. 723 Hz
    B. 7,234 Hz
    C. 362 Hz
    D. 3,617 Hz