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Q1. | Digital circuits mostly use |

A. | Diodes [Wrong Answer] |

B. | Bipolar transistors [Wrong Answer] |

C. | Diodes and bipolar transistors [Correct Answer] |

D. | Bipolar transistors and FETs [Wrong Answer] |

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Explanation:-
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**Also Read Similar Questions Below :**

⇒ Which of the following conditions should be satisfied to call an astable multivibrator circuit using discrete components as a digital circuit?

- A flip-flop is always a digital circuit.
- Only when we assign 1 and 0 to the high and low levels of the output, a flip-flop is called a digital circuit.
- Only if the power, supply voltage is maintained at + 5 V or - 5 V, it is called a digital circuit.
- Only if it is in IC form, following the technology of IC manufacture, it is called a digital circuit.

1 only

2 and 3

2 only

3 and 4

⇒ In TE

_{10}mode of rectangular waveguide

there is one half sine wave variation along

*x*direction and one along

*y*direction

there is one half sine wave variation along

*y*direction and one along

*x*direction

there is one full sine wave variation along

*x*direction and one along

*y*direction

none of the above

⇒ Which of the following oscillators is suitable for frequencies in the range of mega hertz?

RC phase shift

Wien bridge

Hartley

Both (a) and (c)

⇒ The bandwidth of an amplifier can be reduced by

miller effect compensation

pole zero compensation

dominant pole compensation

lead compensation

⇒ Which of the following is not an internal DOS command?

VER

COPY

MEM

DATE

⇒ The orientation polarization of a polyatomic gas is inversely proportional to absolute temperature.

TRUE

FALSE

⇒ The output voltage waveform of a CE amplifier is fed to a dc coupled CRO. The trace on the screen will be

dc output voltage

ac output voltage

sum of dc and ac output voltage

either (a) or (b)

⇒ It is required to measure the true open circuit emf of a battery. The best device is

dc voltmeter

ammeter and known resistance

dc potentiometer

either (a) or (c)

⇒ In figure the coordinates of Q point on the load line are (Neglect V

_{BEIC = 10 mA, VCE = 15 VIC = 5 mA, VCE = 22.5 VIC = 5 mA, VCE = 15 VIC = 10 mA, VCE = 22.5 V}

⇒ A characteristic property of crystal is its periodicity of structure.

TRUE

FALSE

⇒ A dynamometer wattmeter is suitable for both dc and ac.

TRUE

FALSE

⇒ An antenna having an effective temperature of 27°K is fed into a microwave amplifier that has an effective noise temperature of 30 K. Calculate the available noise power per unit bandwidth

30 K

57 K

27 K

3K, K is Boltzmann constant

⇒ Let

*f*

_{1}(

*t*) = G

_{1}(

*t*) + 4,

*f*

_{2}(

*t*) = G

_{2}(

*t*) + 3. If G

_{1}(

*t*) and G

_{2}(

*t*) are uncorrected then the correlation between

*f*

_{1}(

*t*) and

*f*

_{2}(

*t*) are

12

7

6

zero

⇒ A typical value of insertion loss of SAW filter is

15 dB

2 dB

40 dB

60 dB

⇒ A lead compensator

speeds up the transient response

increases the stability margin

increases the stability margin and speeds up the transient-response.

none of the above.

⇒ High frequency waves are

absorbed by F

_{2}layer

affected by solar cycle

reflected by D layer

none of the above

⇒ Energy content of atmospheric noise

does not depend on frequency

decreases as frequency is increased

increases as frequency is increased

either (a) or (c) depending on the temperature

⇒ The dual of A + [B + (AC)] + D is

A + [(B (A + C))] + D

A [B + AC] D

A + [B (A + C)] D

A [B (A + C)] D

⇒ A series RL circuit is excited by a voltage

*v*(

*t*) = V

_{m }sin (ω

*t*+ Φ). The transient current will be zero if

Φ = 0

ω = 0

Φ = tan

^{-1}(ωL/R)

ω - tan

^{-1}(ωL/R) = p/2

⇒ In a coaxial cable, braided copper is used for

conductor

shield

dielectric

jacket

⇒ It is desired to evaluate the expression

`F = B * COS (Y) + C * SQR (COS (Y) + A * COS (Y) * COS (Y) * COS (Y)`

`F = B * COS (Y) + C * SQR [COS (Y)] + A * COS (Y) * SQR [COS (Y)]`

`F = B * COS (Y) + C * COS(Y) * COS (Y) + A * COS (Y) * COS (Y) * COS (Y)`

` X = COS(Y)`

⇒ If V_{dc1} is the dc output voltage in half wave controlled rectifier circuit feeding resistive load and V_{dc2} is the dc output voltage in full wave controlled rectifier circuit (M - 2 connection) feeding resistive load, then

V_{dc1} = 0.5 V_{dc2} for all values of firing angle

V_{dc1} = V_{dc2} for all values of firing angle

V_{dc1} ≤ 0.5 V_{dc2} for all values of firing angle

V_{dc1} ≥ 0.5 V_{dc2} for all values of firing angle

⇒ A circular waveguide carries TE_{11} mode whole radial electric field is give

10 cm

3 p cm

2 p cm

8 cm

⇒ Match the following:

List I (Bits operator in C) List II (Meaning) A. ˜ 1. Bitwise XOR B. & 2. Bitwise AND C. | 3. Bitwise OR D. U 4. One's complement

A-1, B-2, C-3, D-4

A-4, B-3, C-2, D-1

A-2, B-3, C-1, D-4

A-4, B-2, C-3, D-1

⇒ Accumulator is an 8 bit register and is also known as register B.

TRUE

FALSE

⇒ A 0 to 6 counter consist of 3 flip-flop and a combinational circuit of 2 input gates. The combinational circuit consist of

one AND gate

one OR gate

one AND and One OR

two AND gate

⇒ A Hartley oscillator is used for

very low frequencies

radio frequencies

micro wave frequencies

audio frequency

⇒ The dc output voltage from a power supply

increases with higher values of filter capacitance and decreases with more load current

decreases with higher values of filter capacitance and increases with more load current

decreases with higher values of filter capacitance as well as with more load current

increases with higher values of filter capacitance as well as with more load current

⇒ When an ac circuit has sources of different frequencies, the only method of analysis is superposition theorem.

TRUE

FALSE

⇒ Which of the following compensation method in amplifier can be used to reduce the bandwidth?

Pole-zero compensation

Dominant pole compensation

Lead compensation

Any of the above

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