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. | In a Communication system, noise is most likely to affect the signal. |

A. | at the transmitter [Wrong Answer] |

B. | In the channel [Correct Answer] |

C. | in Information source [Wrong Answer] |

D. | at the destination [Wrong Answer] |

View Answer
Explanation:-
Answer : BDiscuss it below :!! OOPS Login [Click here] is required to post your answer/resultHelp other students, write article, leave your comments |

**Also Read Similar Questions Below :**

⇒ A trigonometric series has

single sided spectra

zero

sync function

undefined

⇒ 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

⇒ The following graph, the number of trees (P) and the number of cut-sets (Q)

P = 2, Q = 2

P = 2, Q = 6

P = 4, Q = 6

P = 4, Q = 10

⇒ In the graphical analysis of an amplifier circuit, the slope of dc load line depends on

load resistance only

collector supply voltage only

both load resistance and collector supply voltage

none of the above

⇒ If a RAM has 34 bits in its MAR and 16 bits in its MDR, then its capacity will be

32 GB

16 GB

32 MB

16 MB

⇒

**Assertion (A):** In a circuit using FET, gate is approximately at dc ground

**Reason (R):** Self bias stabilizes the quiescent operating point against changes in JFET parameters

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

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

A is correct R is wrong

A is wrong R is correct

⇒ In the circuit of figure the voltage across capacitor when switch is closed at

*t*= &infin

0 V

20 V

very large

7.5 V

⇒ As the number of flip flops are increased, the total propagation delay of

ripple counter increases but that of synchronous counter remains the same

both ripple and synchronous counters increase

both ripple and synchronous counters remain the same

ripple counter remains the same but that of synchronous counter increases

⇒ Consider the following expressions which indicate the step or impulse response of an initially relaxed system

- [5 - 4
*e*^{-2t}]*u*(*t*) - [
*e*^{-2t}+ 5]*u*(*t*) *d*(*t*) + 8*e*^{-2t}*u*(*t*)*d*(*t*) + 4*e*^{-2t}*u*(*t*)

1 and 3

1 and 4

2 and 4

2 and 3

⇒ For the time domain response shown in figure the

lies in left half plane

lies on imaginary axis

lies along the positive real axis

may be complex or imaginary

⇒ A resistance strain gauge has a resistance of about

100 Ω

25 Ω

10 Ω

1 Ω

⇒ In TV systems, equalising pulses are sent during

horizontal blanking

vertical blanking

serrations

horizontal retrace

⇒ Power gain of antenna equals directive gain in VHF and UHF range if and only if efficiency of the antenna is __________ .

0.25

0.5

0.75

1

⇒ If Z is the number of zeros of 1 + G(

*s*) H(

*s*) in the right half

*s*plane. N is the number of clockwise encircle elements of (-1 +

*jo*) point. P is the number of poles of G(

*s*) H(

*s*) in right half

*s*plane. The Nyquist stability criterion can be expressed as

Z = N + P

Z = P/N

Z = N - P

Z = PN

⇒ Poynting vector signifies which of the following?

Power density vector producing electrostatic field

Power density vector producing electromagnetic field

Current density vector producing electrostatic field

Current density vector producing electromagnetic field

⇒ Which of the following is not correct?

P(A) = P(A) - 1

0 ≤ P ≤ 1

If A and B are mitual exclusive then P(A + B) = P(A) + P(B)

P(A) = 1 - P(A)

⇒ How many and what are the machine cycles needed for execution of MOV D, C?

1, Fetch

2, Fetch and Memory Read

2, Memory Read and Memory write

2, Fetch 4 Bus idle

⇒ The output wave of a cycloconverter consists of a number of segments derived from the input wave.

TRUE

FALSE

⇒ An electron shell corresponding to principal quantum number

*n*can contain a maximum of

*n*

^{2}electrons

2

*n*

^{2}electrons

2

*n*electron

*n*

^{3}electron

⇒ Figure shows an 8-bit LED display. A light circle means that a LED is ON (binary 1) and a dark circle means a LED is OFF (binary 0). What is the decimal equivalent of the binary number displa

100

121

144

172

⇒

**Assertion (A):** Points in the *s* plane at which function G(*s*) is not analytic are called singular, points.

**Reason (R):** Singular points at which the function G(*s*) or its derivative approach infinity are called poles.

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

R is correct but A is wrong

⇒ In communication receivers the fidelity is provided by

audio stage

detector range

mixer stage

all of the above

⇒ The system of the given fi

is unstable for all values of K

is stable for all values of K

can be stable for some values of K

data is insufficient to determine stability

⇒ A single phase semiconverter is supplying RLE load and has a freewheeling diode across the load. The firing angle is a. The freewheeling diode conducts for

a° in each half cycle

(p - a)° in each cycle

a° in one full cycle

(p + a)° in each half cycle

⇒ A periodic voltage has following values for equal time intervals changing suddenly from one value to next, 0, 5, 10, 20, 50, 60, 50, 20, 10, 5, 0, -5, -10 etc. then rms value of the waveform is

31 volt

32 volt

insufficient data

none

⇒ A second order active bandpass filter can be obtained by cascading LP second order filter having higher cut off frequency

*f*

_{OH}with a second order HP filter having lower cut off frequency

*f*

_{OL}provided

*f*

_{OL}<

*f*

_{OH}

*f*

_{OL}>

*f*

_{OH}

*f*

_{OH}=

*f*

_{OL}

*f*

_{OH}< 0.5

*f*

_{OL}

⇒ Consider the following reasons for using antenna coupler

- To prevent illegal radiation of spurious frequencies
- To tune out reactive components of antenna impedance
- To have correct value of load impedance for transmitter.

1, 2, 3

1, 2

1 only

2, 3

⇒ A uniform wave have components

in the perpendicular direction E existing while H is zero

in the direction of propagation E existing while H is zero

E and H are zero in direction perpendicular to direction of propagation

E and H existing only in direction perpendicular to direction of propagation

⇒ In a dual converter both converters work as rectifiers.

TRUE

FALSE

⇒ In transistor radio receivers the number of IF amplifier stages are

1

2

4

6