Users Also Read

MCQ's Search Engine

Electrical Engineering

Mechanical Engineering

Civil Engineering

Automobile Engineering

Chemical Engineering

Computer Engineering

Electronics Engineering

Medical Science Engg

Q1. | An RC oscillator uses |

A. | one RC combination [Wrong Answer] |

B. | two RC combinations [Wrong Answer] |

C. | at least three RC combinations [Correct Answer] |

D. | either (a) or (b) [Wrong Answer] |

View Answer
Explanation:-
Answer : CDiscuss it below :Kishu Kumari Said on 2021-02-18 06:58:20The main advantage of CMOS circuit is . !! OOPS Login [Click here] is required to post your answer/resultHelp other students, write article, leave your comments |

**Also Read Similar Questions Below :**

⇒ The circuit of the given figure perf

OR function

AND function

exclusive OR function

exclusive NOR function

⇒ In a klystron amplifier dc electron velocity is

*v*

_{0}and dc electron charge density is r

_{0}the dc beam current is

r

_{0}

*v*

_{0}

r

_{0}

^{/}

*v*

_{0}

*v*

_{0}

^{/}r

_{0}

(

*v*

_{0}

^{/}r

_{0})

^{2}

⇒ CMRR of a difference amplifier is equal to

(A

_{v}')/(A

_{com})

A

_{v}/A

_{com}

A

_{com}/A

_{v}'

(A

_{v})/(A

_{com})

^{2}

⇒ In a number system with radix

*r*, the decimal value of 110 is equal to 4

*r*. The decimal values of 111 and

*r*respective are equal to

20, 5

16, 4

13, 3

8, 2

⇒ Thermal run away of a transistor occurs when

heat dissipation from transistor is excessive

transistor joints melt due to high temperature

there is excessive leakage current due to temperature rise

none of the above

⇒ Which are of the following oscillators is well suited for the generation of wide range audio-frequency sine waves?

RC phase-shift oscillator

Wien-bridge oscillator

Colpitts oscillator

Hartley oscillator

⇒ The transfer function G

_{12}(

*s*) for a two port is

V

_{2}/V

_{1}

V

_{2}(

*s*)/V

_{1}(

*s*)

V

_{2}(

*s*)/I

_{1}(

*s*)

I

_{2}(

*s*)/I

_{1}(

*s*)

⇒ If a signal

*f(t)*has energy

*E*, the energy of the signal

*f*(2

*t*) is equal to __________ .

*E*

*E*/2

*E*/4

2

*E*

⇒ Which of the following is not correct?

Voltmeter should have a very high resistance

An ammeter should have a very low resistance

A shunt should have a very low resistance

An electronic voltmeter draws appreciable current from source

⇒ A circuit has two branches in parallel and each branch has only one element. The applied voltage and source current are

*v*= 200 sin (200

*t*+ 30°) and

*i*= 50 sin (200

*t*+ 50°). If one branch has capacitor, the other branch contains

resistance

inductance

capacitance

resistance or capacitance

⇒ In a CD, the depth and width of each pit is

0.5 μm each

0.5 μm and 1 mm respectively

1 μm and 0.5 mm respectively

1 μm each

⇒ A uniform plane wave in the free space is normally incident on an infinitely thick dielectric slab (dielectric constant ε

*= 9). The magnitude of the reflection coefficient is*

_{r}0

0.3

0.5

0.8

⇒ If the energy gap of a semiconductor is 1.1 eV, then it would be

opaque to visible light

transparent to visible light

transparent to ultraviolet radiation

transparent to infrared radiation

⇒ The accuracy of measurement using CRO is about

± 0.5%

± 0.05 %

± 1%

± 3%

⇒ Consider the following statements about conditions that make a metal semiconductor contact rectifying

- N type semiconductor with work function φ
_{s}more than work function φ_{M}of metal - N type semiconductor with work function φ
_{s}less than work function φ_{M}of metal - P type semiconductor with work function φ
_{s}more than work function φ_{M}of metal - P type semiconductor with work function φ
_{s}less than work function φ_{M}of metal.

1 and 3 are correct

2 and 3 are correct

1 and 4 are correct

2 and 4 are correct

⇒ Which of the following are useful in comparing the noise performance of receivers?

- Input noise voltage
- Noise figure
- Noise resistance
- Noise temperature

1, 2 and 3

1, 3 and 4

2, 3, 4

1, 2, 4

⇒ A-P type material has an acceptor ion concentration of 1 x 10

^{16}per cm

^{3}. Its intrinsic carrier concentration is 1.48 x 10

^{10}/ cm. The hole and electron mobilities are 0.05m

^{2}/V-sec and 0.13 m

^{2}/V-sec respectively calculate the resistivity of the material

12.5 Ω-cm

1.25 Ω-cm

0.125 Ω-cm

125 Ω-cm

⇒ A system has its two poles on the negative real axis and one pair of poles lies on

*j*ω axis. The system is

stable

unstable

limitedly stable

either (a) or (c)

⇒ The modulation of effective base width by collector voltage is known as Early effect, hence reverse collector voltage

increases both a and β

decrease both a and β

increase a but decrease β

decrease a but increase β

⇒ In a computer the data transfer between hard disk and CPU is nearly the same as that between diskette and CPU.

TRUE

FALSE

⇒ A signal having uniformly distributed amplitude in the interval (- V to + V) is to be encoded using PCM with uniform quantization. The signal to quantization noise ratio is determined by

dynamic range of signal

sampling rate

number of quantizing levels

power spectrum of signal

⇒ A 2-terminal network consists of one of the RLC elements. The elements is connected to an ac supply. The current through the element is 1 A. When an inductor is inserted in series between the source and the element, the current through the element becomes 2 A. What is this element?

A resistor

An inductor

A capacitor

Cannot be single element

⇒ A separately excited dc motor is run from a dc source through a chopper. At 600 rpm and rated torque, the duty cycle of chopper is 0.8. At 600 rpm and half the rated torque, the duty cycle is likely to be

0.9

0.8

0.75

0.6

⇒ If absolute potential of A is - 8 V and that of B is - 16 V, V

_{AB}is equal to

24 V

8 V

- 8 V

- 24 V

⇒ An earth mat for a communication tower consists of

one or two radials extending from base of tower at a depth of about 5 cm below ground

a large number of radials extending from base of tower at a depth of about 3 m

a large number of radials extending from base of tower at a depth of about 30 cm

none of the above

⇒ As per Euler's identity

*e*

^{jωt}= cos ω

*t*+

*j*sin ω

*t*

TRUE

FALSE

⇒

Match the following:

List I | List II | ||
---|---|---|---|

A. | CTFS | 1. | Periodic |

B. | DTFS | 2. | Non-periodic |

C. | CTFT | ||

D. | DTFT |

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

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

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

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

⇒ A reactor is used in a dual converter operating in non-circulating current mode.

TRUE

FALSE

⇒ The hexadecimal number BBC7 is equivalent to decimal number

49761

46791

47691

49761

⇒ In a power diode the reverse recovery time is the time from the instant the forward current is zero to the instant when reverse recovery current has decayed to

50% of peak reverse current

25% of peak reverse current

10% of peak reverse current

zero value