Basics Of Electronics: Quiz!

12 Questions | By Sathyakeerthana2 | Last updated: Mar 21, 2022 | Total Attempts: 82

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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 , f_H is
- A.
  
  1/2π *gm /(Cπ + Cµ)
- B.
  
  1/2π* gm /(C_gs+C_gd)
- C.
  
  1/2π* gm /(Cπ+C_gd)
- D.
  
  1/2π *gm /(C_gs + 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