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Q1. | IC 74181 is a 4 bit device. |

A. | TRUE [Correct Answer] |

B. | FALSE [Wrong Answer] |

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

⇒ In a circular waveguide the dominant mode is

TE

_{01}

TE

_{11}

TE

_{20}

TE

_{21}

⇒ In a CE amplifier circuit the load resistance is open circuited. The output voltage will

increase

decrease

become zero

increase or decrease

⇒ The figure shown below is designed to act as a constant current source across the load resistor. The β of transistor is 50. What is the value of load curr

1.96 mA

2 mA

2.04 mA

None

⇒ A moving coil meter has 10 Ω resistance and requires 40 mA for full scale deflection. The shunt resistance required to convert it into 0-2 A ammeter is

0.1021 Ω

0.2041 Ω

0.256 Ω

0.4210 Ω

⇒ The following table gives some Laplace transforms and the functions

f(t) | F(s) | |

1. | δ(t) | s |

2. | u(t) | 1/s |

3. | tu(t) | 2/s^{2} |

4. | t^{2}u(t) | 2s^{3} |

2 and 4

1 and 4

2 and 4

1 and 2

⇒ The resistance of a metallic wire would

increase as

*f*increase

decrease as

*f*increase

remains the same at all frequencies

increase with

*f*up to a certain frequency and then decrease

⇒

**Assertion (A):** Hollow waveguides are frequently used as transmission lines at microwave frequencies.

**Reason (R):** Waveguide has high power handling capacity, low loss and simple structure.

Both A and R are correct and R is correct explanation of A

Both A and R are correct but R is not correct explanation of A

A is correct but R is wrong

A is wrong but R is correct

⇒ Read the following statements about 8085

`RAL`

instruction rotates`ACC`

contents left by 1 bit- When
`RAL`

instruction is executed once the binary number gets doubled `STC`

means set`CY`

to 1

1 and 2 only

1, 2 and 3 only

1, 2 and 4 only

1 and 4 only

⇒ For an amplifier the input output signals are shown in figure. The class of amplifie

A

AB

B

C

⇒ The resolution of 4 bit counting ADC is 0.5 volt, for an Analog input of 6.6 volts. The digital output of ADC will be

1011

1101

1100

1110

⇒ 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)

⇒ Four voltmeters have following specifications. If accuracy is main consideration which is the best?

100 V, 2 mA

100 V, 100 mA

100 V, 1 mA

100 V, 0.1 mA

⇒ In a low level amplitude modulated system, the amplifier modulated stage must be

class C

linear

non linear

harmonic

⇒ Which of the following integer expressions is correct in Pascal?

`- A + B + M `

` A div B * mod C `

`A - 4.0`

`A / B + D`

⇒ A bistable multivibrator

has no stable state

has one stable state

has two stable state

none of the above

⇒

**Assertion (A):** The carry look ahead adder is very fast

**Reason (R):** The carry look ahead adder generates the carry and sum digits directly.

Both A and R are correct and R is correct explanation of A

Both A and R are correct but R is not correct explanation of A

A is true, R is false

A is false, R is true

⇒ Figure represen

Tunnel diode

PNP transistor

Photo sensitive diode

Photo emissive diode

⇒ Poynting theorem relates the electric intensity E, magnetic intensity H to the rate of energy flow per unit area at a point P as

P = E/H

P = H/E

E = 1/E x H

P = E x H

⇒ Consider a baseband binary PAM receiver shown below. The additive channel noise

*n*(

*t*) is whit with power spectral density S

_{N}(

*f*) = N

_{0}/2 = 10

^{-20}W/Hz. The low-pass filter is ideal with unity gain and cutoff frequency 1 MHz. Let Y

_{k}represent the random variable

*y*(

*t*

10

1.414 x 10

2 x 10

_{k}10^{10}10

^{7}1.414 x 10

^{-10}2 x 10

^{-20}

⇒ Which of the following are voltage controlled devices?

Vacum triode

FET

SCR

Both (a) and (b)

⇒ The trigonometric Fourier series for the waveform

only cosine terms and zero value for the dc component

only cosine terms and a positive value for the dc component

only cosine terms and a negative value for the dc component

only sine terms and a negative for the dc component

⇒ The ending part of the popular teleserial Mahabharat will be beamed to the viewers

WESTAT

INSAT-IC

ARABSAT

INSAT-ID

⇒

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

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

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

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

⇒ In Java 31% gives an answer

3

4

42798

42828

⇒ For an unstable system the gain margin is indicative of how much the gain should be decreased to make the system stable.

TRUE

FALSE

⇒ In an ac series RLC circuit the maximum phase difference between any two voltages can be

90°

45°

- 90°

180°

⇒ 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

⇒ The inductance of connecting leads can be a source of

low frequency parasitics

high frequency parasitics

carrier frequency parasitics

none of the above

⇒

Both A and R are true and R is correct explanation of A

Both A and R are true but R is not correct explanation of A

A is true but R is false

A is false but R is true

⇒ A plane EM wave is travelling in an unbound loss less dielectric having μ

1.5 x 10

3 x 10

2.5 x 10

0.5 x 10

⇒ Which of the following are voltage controlled devices?

Vacum triode

FET

SCR

Both (a) and (b)

⇒ The trigonometric Fourier series for the waveform

*f(t)*shown below cononly cosine terms and zero value for the dc component

only cosine terms and a positive value for the dc component

only cosine terms and a negative value for the dc component

only sine terms and a negative for the dc component

⇒ The ending part of the popular teleserial Mahabharat will be beamed to the viewers

WESTAT

INSAT-IC

ARABSAT

INSAT-ID

⇒

Match the following:

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

A. | R = 0 | 1. | Undamped oscillation |

B. | R < 2 L/C | 2. | Damped oscillation |

C. | R = 2 L/C | 3. | Critically damped response |

D. | R > 2 L/C | 4. | Non-oscillatory response. |

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

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

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

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

⇒ In Java 31% gives an answer

3

4

42798

42828

⇒ For an unstable system the gain margin is indicative of how much the gain should be decreased to make the system stable.

TRUE

FALSE

⇒ In an ac series RLC circuit the maximum phase difference between any two voltages can be

90°

45°

- 90°

180°

⇒ 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

⇒ The inductance of connecting leads can be a source of

low frequency parasitics

high frequency parasitics

carrier frequency parasitics

none of the above

⇒

**Assertion (A):** The resistance of a copper specimen changes by about 22% when temperature is increased from room temperature to 700°C.

**Reason (R):** The physical properties of a material are determined mostly by the extent of impurities.

Both A and R are true and R is correct explanation of A

Both A and R are true but R is not correct explanation of A

A is true but R is false

A is false but R is true

⇒ A plane EM wave is travelling in an unbound loss less dielectric having μ

_{y}= 1 and ε_{y}= 4, the time average Poynting vector of the wave is 5 W/m^{3}. The phase velocity*v*_{p}(assuming velocity of light as 3 x 10^{8}m/sec) is1.5 x 10

^{8}m/sec3 x 10

^{8}m/sec2.5 x 10

^{8}m/sec0.5 x 10

^{8}m/sec