Trishna - The Technical Quiz
20 Questions
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Questions and Answers
- 1.Which mode of operation is preferred to work BJT as an attenuator ?
- A.
Saturation
- B.
Reverse active
- C.
Cut off
- D.
Active
- 2.What is the r.m.s. value of output voltage for an half wave rectifier ,if input V(max)=2 volts ?
- A.
1.414
- B.
1
- C.
2
- D.
2.828
- 3.What is the effect of negative feedback ?
- A.
Increase in noice
- B.
Decrease in bandwidth
- C.
Decrease in gain
- D.
Both b & c
- 4.Bandwidth of DSB-SC signal if maximum frequency component of input message signal 4KHz?
- A.
4KHz
- B.
8KHz
- C.
6KHz
- D.
2KHz
- 5.𝛿(-2t)=
- A.
-𝛿(t)/2
- B.
-2𝛿(t)
- C.
𝛿(t)/2
- D.
2𝛿(t)
- 6.What is the value of Rs for which maximum power is transferred to RL?
- A.
5 Ω
- B.
10 Ω
- C.
0 Ω
- D.
∞ Ω
- 7.Condition for symmetic network ?
- A.
Y12 = - Y21
- B.
AD - BC = 1
- C.
Z11 = Z22
- D.
H12 = - h21
- 8.Any series RLC network represents__________?
- A.
High pass filter
- B.
Low pass filter
- C.
Band pass filter
- D.
Band reject filter
- 9.The value of frequency at which maximum current flows in the circuit is______
- A.
1
- B.
1/2
- C.
1/4π
- D.
1/2π
- 10.Transfer function of a system is
- A.
L.T of impulse response
- B.
L.T of unit step response
- C.
Ratio of L.T of output and L.T of input
- D.
Both '1' and '3'
- 11.Curl of vector is always
- A.
Irrotational
- B.
Solenoidal
- C.
Both
- D.
None
- 12.Convert Binary code (1011)2 to Grey code ?
- A.
1111
- B.
0101
- C.
1110
- D.
1101
- 13.Bandwidth of a given circuit is
- A.
4 Hz
- B.
2 Hz
- C.
6 Hz
- D.
8 Hz
- 14.Given figure is equivalent to ?
- A.
NAND
- B.
OR
- C.
NOR
- D.
AND
- 15.The output expression 'f' is
- A.
AB
- B.
A'+B
- C.
A+B
- D.
A+B'
- 16.Number of NAND gates required for expression A'B+AB' ?
- A.
5
- B.
3
- C.
4
- D.
6
- 17.The frequency of output waveform if propagation delay of each gate is 1/6 ns
- A.
1MHz
- B.
10GHz
- C.
1GHz
- D.
100MHz
- 18.RMS value of ( 5 + 2cos2t + 3sin2t ) =
- 19.Internal resistance of Ideal voltage source is
- 20.Conductivity of pure seiconductor at '0'K is
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