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Q1. | For infinite value of SWR on a transmission line, the line be terminated with impedance as |

A. | an open-circuit [Wrong Answer] |

B. | a short-circuit [Wrong Answer] |

C. | a pure resistance [Wrong Answer] |

D. | all of the above [Correct Answer] |

View Answer
Explanation:-
Answer : DDiscuss 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 a horizontal polarized wave

magnetic field is perpendicular to ground

magnetic field component is parallel to ground

electric field component is perpendicular to ground

electric field is parallel to ground

⇒ An inductor filter has a ripple that __________ with load resistance and consequently is used only with relatively __________ load currents.

decreases, low

decreases, high

increases, low

increases, high

⇒ For a message signal

*m*(

*t*) = cos (2p

*f*) and the carrier frequency

_{m}t*f*, which of the following represents a single side band (SSB) signal?

_{c}cos (2p

*f*) cos (2p

_{m}t*f*)

_{c}tcos (2p

*f*)

_{c}tcos [2p(

*f*+

_{c}*f*) t]

_{m}[1 + cos (2p

*f*) cos (2p

_{m}t*f*)]

_{c}t⇒ An RC circuit initially at rest has a step signal. The response V(

*t*) across C is V(

*t*) = 1 -

*e*

^{-at}, If now there is an initial voltage on C of 2 volts for the same step signal, V(

*t*) is now

1 +

*e*

^{-at}

1 + 2

*e*

^{-at}

2 -

*e*

^{-at}

3 -

*e*

^{-at}

⇒ In the television system in India, each channel is allowed a bandwidth of

20 MHz

12 MHz

7 MHz

3 MHz

⇒ The symbol in figure is

SUS

SBS

Shockley diode

UJT

⇒ (1001-10) is equal to

7

(8)

_{8}

(7)

_{4}

(8)

_{4}

⇒ The IF amplifier in a superheterodyne receiver is

single-stage single-timed amplifier

two stage of single tuned amplifier

double tuned amplifier

class-C amplifier

⇒ Consider the CMOS circuit shown, where the gate voltage V

_{G}of the n-MOSEFT is increased from zero, while the gate voltage of the p-MOSFET is kept constant at 3 V. Assume that, for both transistor, the magnitude of the threshold voltage is 1 V and the product of the transconductor parameter and the (W/L) ratio, i.e. the quality μC

_{0x}(W/L), is 1mA. V

^{-2Both the MOSFET are in saturation regionBoth the MOSFET are in triode regionn-MOSFET is in triode and p-MOSFET is in saturation regionn-MOSFET is in saturation and p-MOSFET is in triode region}

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

A C + A D + ABC

A C + A D + ABC

A C + A D + ACD

A C + A D + AB C

⇒ Consider a multiplexer with X and Y as data inputs and Z as control input. Z = 0 selects input X and Z = 1 selects input Y. What are the connections required to realize the 2-variable Boolean function

*f*= T + R, without using any additional hardware?

R to X, 1 to Y, T to Z

T to X, R to Y, T to Z

T to X, R to Y, 0 to Z

R to X, 0 to Y, T to Z

⇒ A communication channel with additive white Gaussian noise, has a bandwidth of 4 kHz and an SNR of 15. Its channel capacity is

1.6 kbps

16 kbps

32 kbps

256 kbps

⇒ 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

⇒ The boundary conditions at the interface between two dielectrics in an electric field are given by

D

_{normal}= 0, E

_{tangential}= 0

D

_{normal}= 0, E

_{normal}= 0

D

_{tangential}= 0, E

_{tangential}= 0

D

_{tangential}= 0, E

_{normal}= 0

⇒ In microwave communication, some times, microwave signals reach large distances by following the earth curvature. This phenomenon is called

tropospheric scatter

faraday effect

ionospheric reflection

ducting

⇒ An arrangement of several individual antennas to spaced and phased that their individual contributions combine in one preferred direction and cancel in all other directions, to get greater directive gain or directivity, is known as

directional radiation of antennas

antenna gain stability

array of antennas

none of the above

⇒ A VF display operates on the principle of a vacuum diode.

TRUE

FALSE

⇒ In rectifiers the use of RC filters is recommended when

load current is high

load current is small

load current is neither high nor small

either (a) or (c)

⇒ The integral of a unit step function is

an impulse function

a ramp function

a ramp function of slope 1

none of these

⇒ Which of the following microphones has maximum distortion?

Ribbon

Condenser

Crystal

Carbon

⇒ A 3 input NAND gate is to be used as inverter. Which of the following will give better results?

The two unused inputs are left open

The two unused inputs are connected to 0

The two unused inputs are connected to 1

None of the above

⇒ In an oscillator crystal, the parallel resonant frequency is

equal to

higher than

less than

series resonant frequency

⇒ Hystresis loss least depends on

frequency

magnetic field intensity

volume of the material

grain orientation of material

⇒ When a semiconductor bar is heated at one end, a voltage across the bar is developed. If the heated is positive the semiconductor is

*P*-type

*n*-type

intrinsic

highly degenerate

⇒ Schering bridge is used to measure

capacitance and dielectric loss

inductance

resistance

mutual inductance

⇒ A dc machine has 6 poles all connected in series. Each pole has 9 H inductance and field current is 2 A. Total inductance and total energy stored are

9 H and 18 J

18 H and 36 J

54 H and 108 J

108 H and 216 J

⇒ If temperature is increased, the temperature coefficient of a metal

increases

decreases

may increase or decrease

remains constant

⇒ If sequence

*y*(

*n*) =

*x*(-

*n*) then it is

Causal

Non-Causal

Depends on

*x*(-

*n*)

None

⇒ The specific gravity of tungsten is 13.8 and its atomic weight is 184.0 Assume that there are two free elements per atom. Then the Fermi level or characteristic energy for the crystal in

*e*V will be

8.95

*e*V

-8.95

*e*V

7.326

*e*V

-7.326

*e*V

⇒ The magnetic moment in units of Bohr magneton of a ferrous ion in any ferrite is

zero

2

4

6