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Q1. | The op amp is used in |

A. | A/D converters [Wrong Answer] |

B. | D/A converters [Wrong Answer] |

C. | both (a) and (b) [Correct Answer] |

D. | shift registers [Wrong Answer] |

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**Also Read Similar Questions Below :**

⇒ A discrete zero memory information source has 40 symbols and each symbol is equally likely. The minimum number of bits required to code the source with uniform length code and entropy of the source are

5 and 5.03

6 and 5.83

5 and 6.64

6 and 5.32

⇒ In figure the dc load line will meet the

*y*and

*x*axis respectivel

20 mA and 30 V

15 mA and 20 V

25 mA and 40 V

10 mA and 20 V

⇒ A TV receiver is 40 cm wide and 30 cm high. The EHT supply required is about

2kV

20 kV

53 kV

10 W

⇒ Consider the frequency modulated signal 10 cos (2p x 10

^{5}

*t*+ 5 sin (2p x 1500

*t*) + 7.5 sin (2p x 1000

*t*) with carrier frequency of 10

^{5}Hz. The modulation index is

12.5

10

7.5

5

⇒ In measurements using CRO, Lissajous patterns are used to

measure magnitude of peak voltage

measure frequency

measure impedance

measure current

⇒ As the frequency is increased, the charging MVAR in a cable

decreases

increases

remain the same

decreases or remains the scheme

⇒ A microprocessor needs memory chips and input-output chip to form a microcomputer.

TRUE

FALSE

⇒ The most important set of specifications of transformer oil include

dielectric strength and viscosity

dielectric strength and flash point

viscosity and flash point

flash point and viscosity

⇒ A two branch parallel tuned circuit has a capacitance C in one of the two branches and resistance R in second branchs. As C is decreased the dynamic resistance

increases

decreases

remains constant

may increases or decreases

⇒ In a uniformly doped BJT, assume that N

_{E}, N

_{B}and N

_{C}are the emitter, base and collector dopings in atoms/cm

^{3}, respectively. If the emitter injection efficiency of the BJT is close unity, which one of the following conditions is TRUE?

N

_{E}= N

_{B}= N

_{C}

N

_{E}>> N

_{B}and N

_{B}> N

_{C}

N

_{E}= N

_{B}and N

_{B}< N

_{C}

N

_{E}< N

_{B}< N

_{C}

⇒ The minimum permissible size of aluminium cable for lighting circuit is

1.2 sq. mm

1.5 sq. mm

2.2 sq. mm

3.5 sq. mm

⇒ When subjected to alternating stresses, an insulating material is characterised by complex dielectric constant ∈

^{'}

_{r}-

*j*∈

^{"}

_{r}. In such materials, the dielectric losses under alternating stress is proportional

∈

^{"}

_{r}

both ∈

^{'}

_{r}and ∈

^{"}

_{r}

∈

^{'}

_{r}

(∈

^{"}

_{r})

^{2}

⇒ Watthour meter is an integrating instrument

TRUE

FALSE

⇒ The following sequence represents autocorrelation of a real valued signal. The energy of real valued sequence is given by __________

*x(n)*= {1, _, 3, _, 5, _, 7, _, 9, 10, _, 8, _, 6, _, 4, _, 2

2[1

^{2}+ 2

^{2}+ 3

^{2}+ 4

^{2}+ 5

^{2}+ 6

^{2}+ 7

^{2}+ 8

^{2}+ 9

^{2}] + 10

^{2}

10

10

^{2}

2[1

^{2}+ 2

^{2}+ 3

^{2}+ 4

^{2}+ 5

^{2}+ 6

^{2}+ 7

^{2}+ 8

^{2}+ 9

^{2}+ 10

^{2}]

⇒ The noise temperature of sky is about __________ °K.

100

273

0

30

⇒ Maximum effective aperture of an antenna which is operating at a wavelength of 3 meters and has a directivity of 100

71.68 m

^{2}

716 m

^{2}

7.16 m

^{2}

71.6 m

^{2}

⇒ An one sided abrupt junction has 10

^{21}/m

^{3}of dopants on the lightly doped side, zero bias voltage and a built-in potential of 0.2 V. The depletion width of abrupt junction.(

*q*= 1.6 x 10

^{-19}C, ε

_{r}=16, ε

_{0}= 8.87 x 10

^{-12}F/

*m*) is

0.036 nm

0.6 μm

3 mm

1.5 mm

⇒ Ripple factor RF and form factor FF are related as

RF = FF

^{2}- 1

RF = (FF

^{2}- 1)

^{0.5}

RF = FF - 1

RF = (FF - 1)

^{0.5}

⇒ Tellegen's theorem is applicable to

circuits with passive elements only

circuits with linear elements only

circuits with time invariant elements only

circuits with active or passive, linear or nonlinear and time invariant or time varying elements

⇒ Which of the following logic family is fastest of all?

TTL

RTL

DCTL

ECL

⇒

Match the following:

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

A. | RC coupled amplifier | 1. | Very low drift |

B. | Tuned amplifier | 2. | Flat frequency response from zero frequency onwards |

C. | Chopper stabilized amplifier | 3. | Flat frequency response with upper and lower cut off frequency |

D. | DC amplifier | 4. | Peak in gain frequency response |

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

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

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

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

⇒ A voltage doubler circuit uses

two diodes

two capacitors

two diodes and two capacitors

none of the above

⇒ A reflex klystron oscillator uses

one cavity resonator

two cavity resonators

three cavity resonators

none of the above

⇒ Which instrument needs creep compensation?

Dynamometer wattmeter

Induction wattmeter

Energy meter

Both (b) and (c)

⇒ A generator with an internal resistance of 600 Ω drives an amplifier whose input resistance is 400 Ω. The generator's open circuit voltages is 1 mV; the amplifier develops 100mV across an 8kΩ load. The input voltage to the amplifier is

0.1 m V

0.4 m V

1 m V

4 m V

⇒ The figures shows the symbo

p channel depletion MOSFET

p channel enhancement MOSFET

complementary MOSFET

p channel JFET

⇒ Dolby system of noise reduction divides the total audio spectrum into

8 frequency bands

4 frequency bands

2 frequency bands

none of the above

⇒ A narrow band noise show

AM only

AM and FM

FM

PCM

⇒ In figure, the steady state current through 1H inductanc

Zero

0.125

0.208333333333333

0.25

⇒

*n*-channel MOS is

slower than

*p*-channel MOS

faster than

*p*-channel MOS

same as

*p*-channel MOS

none of these