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Q1. | A carrier wave carries information. |

A. | TRUE [Wrong Answer] |

B. | FALSE [Correct Answer] |

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

⇒

**Assertion (A):** The function δ'(*t* - *b*) is equal to 0 for *t* ≠ *b*

**Reason (R):** A number of impulses spaced from one another form an impulse train.

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

⇒ An LED is

an ohmic device

a display device

a voltage regulated device

all of the above

⇒ 9's complement of 12

_{10}is

21

_{10}

87

_{10}

78

_{10}

76

_{10}

⇒ During transmission over a communication channel, bit errors occur independently with probability P. If a block of

*n*bits is transmitted, the probability of at most one bit error is equal to

1 - (1 - P)

^{n}

P + (

*n*- 1) (1 - P)

*n*P (1 - P)

^{n - 1}

(1 - P)

^{n}+

*n*P (1 - P)

^{n - 1}

⇒ A constant

*k*low pass filter has

*f*

_{c}= 1000 Hz. At

*f*= 500 Hz, the phase shift is

p

zero

more than p

less than p

⇒ In a four variable K map eight adjacent cells give

single variable term

two variable term

three variable term

four variable term

⇒ 110.11

_{2}x 110

_{2}= __________

_{10}

40.5

30.5

20.5

10.5

⇒ If temperature increases by about 50°, the resistance of thermistor changes to

half of its initial value

twice of its initial value

eight times of its initial value

one eight of its initial value

⇒ Which one of the following is also called 'rat race'?

E plane tee

H plane tee

Magic tee

Hybrid ring

⇒ In a biased limiter the clipping level can be adjusted by adjusting the voltage of battery.

TRUE

FALSE

⇒ The slope of log-magnitude asymptote changes by - 40 dB/ decade at a frequency ω

_{1}. This means that

a double pole is present

a pair of complex conjugate poles is present

either a double pole or a pair of complex conjugate poles is present

a pole or zero at origin is present

⇒ An ideal rectifier should have

100% efficiency, zero ripple factor, zero harmonic factor and unity displacement factor

100% efficiency, zero tipple factor, zero harmonic factor and zero displacement factor

100% efficiency, zero ripple factor, unity harmonic factor and unity displacement factor

100% efficiency, unity ripple factor, zero harmonic factor and unity displacement factor

⇒ A zinc carbon cell is a primary cell.

TRUE

FALSE

⇒ The number of logic devices required in a Mod-16 synchronous counter are

4

5

6

7

⇒ In a low power factor wattmeter, the resistance of pressure coil is more than in ordinary wattmeter.

TRUE

FALSE

⇒ The emission of light is LED due to

emission of holes

emission of electrons

generation of electromagnetic radiations

conversion of heat energy into illumination

⇒ The number of digits in octal system is

8

7

9

10

⇒

Match the following:

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

A. | Servomotor | 1. | Error detector |

B. | Amplidyne | 2. | Transducer |

C. | Potentiometer | 3. | Actuator |

D. | Flapper valve | 4. | Power amplifier |

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

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

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

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

⇒ Consider the following; for a loss-less transmission line we can write,

- Z
_{in}= -*jz*_{0}for a shorted line with*l*= λ/8 - Z
_{in}= ±*j*∞ for a shorted line with*l*= λ/4 - Z
_{in}=*jz*_{0}for an open line with*l*= λ/2 - Z
_{in}= 0 for a matched line of any length

1, 2

2, 3

1, 3

2, 4

⇒ The SCR would be turned OFF by voltage reversal of applied anode-cathode ac supply of frequency of

30 kHz

15 kHz

5 kHz

20 kHz

⇒ The leads in a TRIAC are denoted by

anode cathode, gate

T

_{1}T

_{2}, gate

T

_{1}, T

_{2}, anode

T

_{1}, T

_{2}, T

_{3}

⇒ The electric energy required to raise the temperature of a given amount of water is 1000 kWh. If heat losses are 25%, the total heating energy required is __________ kWh.

1500

1250

1333

1000

⇒ If

*x*

_{1}(

*t*) = 2 sin p

*t*+ cos 4 p

*t*and

*x*

_{2}(

*t*) = sin 5 p

*t*+ 3 sin 13 p

*t*then

*x*

_{1},

*x*

_{2}both periodic

*x*

_{1}

*x*

_{2}both not periodic

*x*

_{1}periodic,

*x*

_{2}not periodic

*x*

_{1}is not periodic ; but

*x*

_{2}is periodic

⇒ Consider the following statements: The radar pulse must be flat topped to

- allow accurate range measurement
- allow good minimum range
- prevent frequency changes in magnetron
- make the returned echoes easier to distinguish from noise.

1, 2, 3, 4

1, 2, 3

1, 2

1, 3, 4

⇒ A Hartley oscillator uses

a tapped capacitor

a tapped inductor

a tapped inductor for inductive feedback

none of the above

⇒ If ROC of

*x*[

*n*] is R

*then ROC of*

_{1}*a*

^{n}*x*[

*n*] is

R

_{1}

*a*

R

_{1}/

*a*

*a*/R

_{1}

R

_{1}+

*a*

⇒ Given below a block diagram of oscillator circuit with various reactance elemen

*x*

_{1}= C,

*x*

_{2}= L,

*x*

_{3}= C

*x*

_{1}= C,

*x*

_{2}= L,

*x*

_{3}= L

*x*

_{1}= C,

*x*

_{2}= C,

*x*

_{3}= L

*x*

_{1}= L,

*x*

_{2}= C,

*x*

_{3}= L

⇒ In a television camera tube, scanning of a picture is done

line by line from left to right

line by line from right to left

line by line from top to bottom

line by line from bottom to top

⇒ Consider the following program in Ba

60, 20, 20, 30, 10

10, 30, 20, 20, 60

60, 20, 30, 10, 20

60, 30, 10, 20, 20

⇒ Which of the following sampling frequencies is considered adequate in voice telephony?

4 kHz

8 kHz

16 kHz

32 kHz