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. | For plane wave propagating in free space or two conductor transmission line, what must be the relationship between the phase velocity v , the group velocity _{p}v and speed of light _{g}c? |

A. | v > _{p}c > v [Wrong Answer]_{g} |

B. | v < _{p}c < v [Wrong Answer]_{g} |

C. | v = _{p}c = v [Correct Answer]_{g} |

D. | v < _{p}v < _{g}c [Wrong Answer] |

View Answer
Explanation:-
Answer : CDiscuss 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 :**

⇒ In order to enable RST 5.5, RST 6.5 and RST 7.5 interrupts, which of the following instructions are needed?

El only

SIM only

El and SIM only

None

⇒ The depth of modulation is doubled in FM system then, the power transmitted

increase by factor of 2

increase by factor of 3

increase by factor of 2

none of the above

⇒ Pulse modulation is often used in

microwave band

FL band

telegraphy

telephony

⇒ What is the maximum output voltage from the 741 op-amp?

Zero

Approximately 1 V

Approximately 3 V

Approximately 5 V

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

Zero

0.125

0.208333333333333

0.25

⇒ Which of the following memory is preferred in case of calculators?

Dynamic RAM

Dynamic ROM

Static ROM

Static RAM

⇒ At room temperature the barrier potential in a silicon diode is

0.1 V

0.3 V

0.7 V

1 V

⇒ Energy density function is always

even

odd

neither even nor odd

both (a) and (b)

⇒ Two function

*g*

_{1}(

*t*) and

*g*

_{2}(

*t*) with correlation of 6 has average power of 4 and 5 respectively. The power of

*g*

_{1}(

*t*) +

*g*

_{2}(

*t*) is

9

21

3

15

⇒ The current rating of a cable depends on

length of cable

diameter of cable

both length and diameter of cable

none of the above

⇒ If I = J = K = 13, then in Fortran 1 = 10 - (1 / 10) * 10 + (J / 5) * 4 + K ** (- 2) is equal to

8

7

6

5

⇒ Costa's receiver is used for

Coherent detection of AM-SC signal

Asynchronous detection of AM-SC signal

Coherent detection of DSB-SC signal

Asynchronous detection of DSB-SC signal

⇒ In figure which is correct at any time

*t*

I =

I =

I =

I =

I =

*i*_{R}+*i*_{L}I =

*i*_{R}+*i*_{L}*i*_{C}I =

*i*_{R}+*i*_{L}-*i*_{C}I =

*i*_{R}-*i*_{L}-*i*_{C}

⇒ A battery charger can drive a current of 5A with 1Ω resistance connected at its output. If it can charge 2 V battery at 7 A rate, its Thevenin's equivalent circuit will be

7.5 in series with 0.5 Ω resistance

1.25 V in series with 1.5 Ω resistance

7.5 V in parallel with 0.5 Ω resistance

12.5 V in parallel with 1.5 Ω resistance

⇒ For K map of the given figure the simplified Boolean expressio

Y = A B C + A B C + A B C

Y = A C + B

Y = A B C + ABC

Y = A B C + AB C + ABC

⇒ The number of electrons in motion at the instant of positive peak of a symmetrical ac wave is the same as that at the instant of negative peak.

TRUE

FALSE

⇒ In a CE amplifier it is desired that the signal should be able to swing equally in both directions. Then the Q point should be

at the centre of ac load line

at the centre of dc load line

at the centre of collector voltage

at the centre of collector current

⇒ The two-transistor model of a thyristor consists of two transistors :

one

both

both

one

⇒ What is the addressing mode used in instruction MOV M, C?

Direct

Indirect

Induced

Immediate

⇒ Current having waveform in figure flows through 10 Ω resistance. Average powe

1000 W

500 W

333.3 W

250 W

⇒ In 8085 microprocessor based system running at 3 MHz clock frequency what should be the minimum pulse width of the INTR signal, so that it is recognized successfully?

0.33 μs

0.666 μs

5.8 μs

none of these

⇒ In a line VSWR of a load is 6 dB. The reflection coefficient will be

0.033

0.33

0.66

3.3

⇒ Access time of a storage is the time required

to write one word into the memory

to read one word from the memory

to write one word into and to read one word from the memory

either to write one word or to read one word

⇒ The coils of Drysdale polar potentiometer are wound non-inductively.

TRUE

FALSE

⇒ The Boolean function/implemented in the figure using two I/P multiplexer

ABC + ABC

ABC + AB C

ABC + ABC

ABC + AB C

⇒

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

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

A is true but R is false

A is false but R is true

⇒ In a semiconductor avalanche breakdown occurs when

reverse bias exceeds the limiting value

forward bias exceeds the limiting value

forward current exceeds the limiting value

potential barrier is reduced to zero

⇒ The output

S is linear and time-invariant

S is linear and time-varying

S is non-linear and time-invariant

S is non-linear and time-varying

⇒ An accelerometer has a seismic mass of 0.05 kg and spring constant of 3 x 10

30 m/s

60 m/s

90 m/s

120 m/s

⇒ If a function Z(

the degrees of numerator and denominator are equal

the degree of numerator is one higher than that of denominator

the degree of denominator is one higher than that of numerator

the difference between the degrees of numerator and denominator is 0 or 1

⇒ A battery charger can drive a current of 5A with 1Ω resistance connected at its output. If it can charge 2 V battery at 7 A rate, its Thevenin's equivalent circuit will be

7.5 in series with 0.5 Ω resistance

1.25 V in series with 1.5 Ω resistance

7.5 V in parallel with 0.5 Ω resistance

12.5 V in parallel with 1.5 Ω resistance

⇒ For K map of the given figure the simplified Boolean expressio

Y = A B C + A B C + A B C

Y = A C + B

Y = A B C + ABC

Y = A B C + AB C + ABC

⇒ The number of electrons in motion at the instant of positive peak of a symmetrical ac wave is the same as that at the instant of negative peak.

TRUE

FALSE

⇒ In a CE amplifier it is desired that the signal should be able to swing equally in both directions. Then the Q point should be

at the centre of ac load line

at the centre of dc load line

at the centre of collector voltage

at the centre of collector current

⇒ The two-transistor model of a thyristor consists of two transistors :

one

*n*-*p*-*n*and other*p*-*n*-*p*both

*p*-*n*-*p*both

*n*-*p*-*n*one

*n*-*p*-*n*and other UJT⇒ What is the addressing mode used in instruction MOV M, C?

Direct

Indirect

Induced

Immediate

⇒ Current having waveform in figure flows through 10 Ω resistance. Average powe

1000 W

500 W

333.3 W

250 W

⇒ In 8085 microprocessor based system running at 3 MHz clock frequency what should be the minimum pulse width of the INTR signal, so that it is recognized successfully?

0.33 μs

0.666 μs

5.8 μs

none of these

⇒ In a line VSWR of a load is 6 dB. The reflection coefficient will be

0.033

0.33

0.66

3.3

⇒ Access time of a storage is the time required

to write one word into the memory

to read one word from the memory

to write one word into and to read one word from the memory

either to write one word or to read one word

⇒ The coils of Drysdale polar potentiometer are wound non-inductively.

TRUE

FALSE

⇒ The Boolean function/implemented in the figure using two I/P multiplexer

ABC + ABC

ABC + AB C

ABC + ABC

ABC + AB C

⇒

**Assertion (A):** Two terminal black boxes of R and C can be identified by plotting their static V-I characteristics.

**Reason (R):** The V-I characteristic of resistance is a straight line of slope R passing through origin.

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

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

A is true but R is false

A is false but R is true

⇒ In a semiconductor avalanche breakdown occurs when

reverse bias exceeds the limiting value

forward bias exceeds the limiting value

forward current exceeds the limiting value

potential barrier is reduced to zero

⇒ The output

*y*(*t*) of a continuous-time system*S*for the input*x*(*t*) is givenS is linear and time-invariant

S is linear and time-varying

S is non-linear and time-invariant

S is non-linear and time-varying

⇒ An accelerometer has a seismic mass of 0.05 kg and spring constant of 3 x 10

^{5}N/m. If maximum displacement of mass is ± 1 mm, the maximum acceleration which can be measured is30 m/s

^{2}60 m/s

^{2}90 m/s

^{2}120 m/s

^{2}⇒ If a function Z(

*s*) has a pole at infinity, thenthe degrees of numerator and denominator are equal

the degree of numerator is one higher than that of denominator

the degree of denominator is one higher than that of numerator

the difference between the degrees of numerator and denominator is 0 or 1