Basics Of Electronics: Quiz!

12 Questions | Total Attempts: 20

SettingsSettingsSettings
Please wait...
Basics Of Electronics: Quiz!

.


Questions and Answers
  • 1. 
    The gate-source voltage at which the ________________ layer in a MOSFET is formed is called the ________________ voltage.
    • A. 

      Inversion,threshold

    • B. 

      Depletion,threshold

    • C. 

      Inversion,bias

    • D. 

      Depletion,bias

  • 2. 
    Transition Frequency of an MOSFET , fH is
    • A. 

      1/2π *gm /(Cπ + Cµ) 

    • B. 

      1/2π* gm /(Cgs+Cgd)

    • C. 

      1/2π* gm /(Cπ+Cgd)

    • D. 

      1/2π *gm /(Cgs + Cµ)

  • 3. 
    In a low-pass filter consisting of a resistor and a capacitor, how will the cut-off frequency change if the capacitance is increased?
    • A. 

      Cut-off frequency does not change

    • B. 

      Cut-off frequency increases

    • C. 

      Cut-off frequency decreases

    • D. 

      Cut-off frequency doesn’t depend on capacitance value

  • 4. 
    Which is a primary disadvantage of a solid-state amplifier compared with a vacuum-tube amplifier?
    • A. 

      Poor tolerance for low-current and -voltage transients

    • B. 

      Poor tolerance for high -current and -voltage transients.

    • C. 

      Both a) & b)

    • D. 

      None of the above

  • 5. 
    A transistor has a current gain of 0.5 in the CB mode. Its current gain in the CC mode is:
    • A. 

      2

    • B. 

      1

    • C. 

      50

    • D. 

      20

  • 6. 
    An LED has a rating of 4V and 100 mA. It is used along with a 12V battery. The range of series resistance is:
    • A. 

      0 to 200

    • B. 

       200 to 500

    • C. 

       Less than 200

    • D. 

      None of the above

  • 7. 
    What is the standard sound pressure for defining Signal to Noise ratio of microphones?
    • A. 

      0.1 Pa

    • B. 

      0.01 Pa

    • C. 

      0.2 Pa

    • D. 

      0.5 Pa

  • 8. 
     Zener diode can be used as _____
    • A. 

       AC voltage regulator only

    • B. 

        DC voltage regulator only

    • C. 

      Both AC and DC regulator

    • D. 

        None of the above

  • 9. 
    A galvanometer in series with a high resistance is called?
    • A. 

        Ammeter

    • B. 

       Voltmeter

    • C. 

       Wattmeter

    • D. 

       None of the above

  • 10. 
    BC147 transistor indicates that it is made of:
    • A. 

        Carbon

    • B. 

        Silicon

    • C. 

        Germanium

    • D. 

        None of the above

  • 11. 
     A 1000V power supply would use  ___ as a filter capacitor.
    • A. 

       Paper capacitor

    • B. 

       Mica capacitor

    • C. 

       Electrolytic capacitor

    • D. 

       Air capacitor

  • 12. 
    A telephone exchange has 10000 subscribers. If the number of calls originating at peak time is 8000 in one hour, the calling rate is
    • A. 

      5/4

    • B. 

      0.08

    • C. 

      4/5

    • D. 

      0.1

Back to Top Back to top