The value of VBE ___________________?

Related Mcqs:

1. For faithful amplification by a transistor circuit, the value of VBE should_____________for a silicon transistor?

   A. Be zero
   B. Be 0.01 V
   C. Not fall below 0.7 V
   D. Be between 0 V and 0.1 V

2. A silicon transistor is biased with base resistor method. If ß=100, VBE =0.7 V, zero signal collector current IC = 1 mA and VCC = 6V , what is the value of the base resistor RB ?

   A. 105 kO
   B. 530 kO
   C. 315 kO
   D. None of the above

3. In a base resistor method, if the value of ß changes by 50, then collector current will change by a factor ___________________?

   A. 25
   B. 50
   C. 100
   D. 200

4. If the value of collector current IC increases, then the value of VCE ______________?

   A. Remains the same
   B. Decreases
   C. Increases
   D. None of the above

5. In a certain five-step R/2R ladder network, the smallest resistor value is 1 kΩ. The largest value is___________?

   A. Indeterminable
   B. 2 kΩ
   C. 10 kΩ
   D. 20 kΩ

6. Rotor of a motor is usually supported on ___________________ bearings?

   A. ball or roller
   B. needle
   C. bush
   D. thrust

7. Class C amplifiers are used as ___________________?

   A. AF amplifiers
   B. Detectors
   A. amplifiers
   C. None of the above

8. In the a.c. equivalent circuit of a transistor amplifier, the capacitors are considered ___________________?

   A. Short
   B. Open
   C. Partially open
   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. For faithful amplification by a transistor circuit, the value of VCE should______________for silicon transistor?

    A. Not fall below 1 V
    B. Be zero
    C. Be 0.2 V
    D. None of the above