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Q1. | The phase velocity in a coaxial line is |

A. | greater than C [Correct Answer] |

B. | equal to C [Wrong Answer] |

C. | less than C [Wrong Answer] |

D. | not depend on C [Wrong Answer] |

View Answer
Explanation:-
Answer : ADiscuss 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 :**

⇒ Millman's theorem is the best to find

equivalent voltage or current source

equivalent voltage source

equivalent voltage and resistance of a circuit

none of the above

⇒ In shot noise

the current rises around mean value

the current rises to peak value, decreases to zero and then again rises

the current may become negative

the current is always less than the mean value

⇒ The circuit of the given figur

full adder

magnitude comparator

parity detector

none of the above

⇒ An FM transmitter delivers 80W to a load of 30 W when no modulation is present. The carrier is now frequency modulated by a single sinusoidal signal and the peak frequency deviation is so adjusted to make the amplitude of the second sideband is zero in the given out

5.12 W

21.78 W

2.56 W

16.81 W

⇒ In free space

phase velocity is greater than light velocity

phase velocity is equal to group velocity

phase velocity is equal to light velocity

Both (b) and (c)

⇒

Match the following:

List I (Signal) | List II (Value) | ||
---|---|---|---|

A. | AM | 1. | 0 0.5 |

B. | DSB - SC | 2. | 1 |

C. | SSB | 3. | 2 |

D. | FM (β = 2) | 4. | 16 |

E. | FM (β = 5) | 5. | 8 |

A-1, B-3, C-2, D-5, E-4

A-3, B-3, C-1, D-5, E-4

A-2, B-1, C-4, D-5, E-5

A-4, B-2, C-5, D-3, E-1

⇒ Which one of the following compounds is widely used for making ferrites?

FeO

CuO

MgO

Fe

_{2}O

_{3}

⇒ In Z

_{RC}(

*s*) has a pole at

*s*= ∞, the last element in first Foster realization is

R

C

R and C in series

R and C in parallel

⇒ The number of variables in a function is odd and the number of minterms with even number of 0's are same as the number of minterms with odd number at 1's, the expression formed can be represented in __________ as well as __________ form.

Ex - OR, NOR

Equivalence, Ex - OR

AND, Coincidence

OR, Ex - OR

⇒ Direct-memory-access channel facilitates data to move into and out of the system.

without subroutine

with equal time delay

without programme intervention

on first come first serve basis

⇒

**Assertion (A):** A non-sinusoidal wave can be expressed in terms of sine waves of different frequencies which are multiples of the frequency of fundamental.

**Reason (R):** If negative half of a complex wave is a reproduction of the positive half, the even harmonics are absent.

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

⇒ The

*z*-transform of a particular signal is gi

casual and stable

non-casual and stable

non-casual and unstable

casual and unstable

⇒ Entropy gives

measure of Uncertainty

rate of Information

average information

probability of Information

⇒ The scale of PMMC instrument is linear.

TRUE

FALSE

⇒ A stationary process has

all statistical properties independent of time

all statistical properties dependent of time

zero variance

ensemble average equal to time average

⇒ The loss of charge method can be used to measure

resistance of shunt

insulation resistance of cable

resistance of shunt winding

both (b) and (c)

⇒ An enhancement mode MOSFET is off when the gate voltage is

zero

negative

less than threshold value

none of the above

⇒ In a class C amplifier, full cycle conductor of the current is achieved by employing

tuned circuit

transformers

complementary pair

Push pull configuration

⇒

**Assertion (A):** In series R-L-C circuit, the current may lead or lag the voltage depending on the value of R.

**Reason (R):** Phase angle of an R-L series circuit is tan^{-1} (ωL/R).

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

⇒ A quiescent state of a transistor implies

zero bias

no output

no distortion

no input signal

⇒ A point charge of 6 μC is located at the origin, uniform line charge density of 180

*n*C/

*m*of 8

*m*length lies along the

*x*axis and a uniform sheet of charge equal to 25

*n*C/

*m*

^{2}of area p x 4

^{2}lies in the

*z*= 0 plane. Calculate total electric flux leaving the surface of sphere of 4

*m*radius centered at origin.

86.97 μC

8.697

*n*C

8.697 μC

86.97

*n*C

⇒ For a 400 kHz transmission line having L = 0.5 mH/km, C = 0.08 mF and negligible R and G, the velocity propagation will be

15.8303 km/s

15.830 km/s

1.583 km/s

0.1583 km/s

⇒ In the given figure shows a 10dB directional coupler. If power input at port 1 is 100 mW, power output at port

10 mW

15 mW

20 mW

25 mW

⇒ Which of the following is an oscillator with best frequency stability?

Crystal oscillator

Clapp oscillator

Phase shift circuit

Multivibrator

⇒ In a modem digital computer, a subtractor in normally not used because

subtractors are very expensive

the design of a subtractor is very complex

the adder is geared for doing subtraction

most of the programs do not require subtraction

⇒ In TV broadcast, UHF range is

606 - 790 MHz

100 - 150 MHz

41 - 68 MHz

174 - 230 MHz

⇒ For the system of the given figure |G(

*j*ω)| = 0 dB at &omeg

0

1 rad/sec.

∞

2.38 rad/sec.

⇒ In a stop-and-wait ARQ system, the transmitting terminal

waits for positive or negative acknowled-gement from the receiving terminal after sending a block

sends another block if positive acknowledge is received through ACK character

resends the previous block if negative acknowledgement is received through a NAK character

does not wait for acknowledgement after sending a block

⇒ If noise margin is high, there is lesser chance of false operation.

TRUE

FALSE

⇒ If E

_{y}is the voltage applied to Y plates, the vertical deflection of beam is proportional to

E

_{y}

E

_{y}

E

_{y}

^{1.5}

E

_{y}

^{2}