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Q1. | HVDC systems are preferable for only long distances. |

A. | TRUE [Correct Answer] |

B. | FALSE [Wrong Answer] |

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

⇒ A 0 to 6 counter consist of 3 flip-flop and a combinational circuit of 2 input gates. The combinational circuit consist of

one AND gate

one OR gate

one AND and One OR

two AND gate

⇒ In a 3 phase full converter, the instantaneous output voltage can have negative part if

firing angle is less than 60°

firing angle is less than 90°

firing angle is more than 60°

firing angle is more than 90°

⇒ In a second order system, the time constant t of exponential envelopes depends

only on damping factor

only on natural frequency

both on damping factor and natural frequency

neither on damping factor nor on natural frequency

⇒ The phase angle curve of G(

*j*ω) H(

*j*ω) can be drawn

by adding the phase angle curves of individual factors

by subtracting the phase angle curves of individual factors

by multiplying the phase angle curves of individual factors

by dividing the phase angle curves of individual factors

⇒

Match the following:

List I (Double Rectifier) | List II (Number of Diodes) | ||
---|---|---|---|

A. | Full wave Bridge rectifier | 1. | 1 |

B. | Half wave rectifier | 2. | 2 |

C. | Full wave rectifier using centre tapped transformer | 3. | 4 |

A-1, B-2, C-3

A-3, B-1, C-2

A-2, B-1, C-3

A-3, B-1, C-2

⇒ To make antenna more directional, either its size must be increased or

the number of its feed horns must be increased

the frequency of its transmission must be increased

its effective isotropic radiated power (EIRP) must be increased

its footprint must be increased

⇒ Find

*V*

_{o}(

*t*) for the following circ

0 V

5 V

3 V

2 V

⇒ RF amplifiers are used in radio receivers for

better sensitivity

improved signal-to-noise ratio

better coupling of receiver to the antenna

all of the above

⇒ In a two stage cascade amplifier, each stage has a gain of 10 dB and noise figure of 10 dB. The overall noise factor is

10

1.09

1

10.9

⇒ A frequency multiplier stage should operate as

class A

class AB

class C

either of the above

⇒ In the expression 3 * * 2 ** 4 ** 2 in FORTRAN 77 which exponentiation is performed first

4 * * 2

2 * * 4

3 * * 2

all exponentiation are performed together

⇒ A (0.75 -

*j*50) ohm load is connected to a coaxial transmission line of Z

_{0}= 75 ohms at a frequency of 10 GHz Which of the following will be the best method of matching?

Connecting an inductance at the end

Connecting a short circuited stub at the load

Connecting a capacitance at some distance from the load

Connecting a short circuited stub at some specified distance from the load

⇒

**Assertion (A):** Water waves are longitudinal but EM waves are transverse

**Reason (R):** In an EM wave electric field, magnetic field and propagation are mutually perpendicular.

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

A is wrong but R is correct

⇒ The number of bits of information required to indicate the correct selection of 3 independent consecutive events out of 75 equally probable events is

6.23

18.69

10.46

24.92

⇒ To obtain very high I/P and O/P impedances in a feedback amplifier, the topology used is

voltage series

current series

voltage shunt

current shunt

⇒ Carbon resistances are used in very high values.

TRUE

FALSE

⇒ A 400 W carrier is amplitude modulated with

*m*= 0.75. If single side band suppressed carrier is used the total power in modulated wave is

400 W

512 W

112 W

56 W

⇒ In 8 cavity magnetron the p mode corresponds to a total phase shift equal to

± 8 p radians around the periphery

± 4 p radians around the periphery

± 2 p radians around the periphery

± 16 p radians around the periphery

⇒ In a crystal

the frequencies of series and parallel resonance are equal

the frequency of series resonance is more than frequency of parallel resonance

the frequency of parallel resonance is more than frequency of series resonance

None of the above

⇒ With a JK master-slave flip-flop the master is clocked when the clock is __________ , and the slave is triggered when the clock is __________ .

low, low

high, low

low, high

high, high

⇒ The resolution of a 4 bit counting ADC is 0.5 volts. For an analog input of 6.6 volts, the digital output of the ADC will be

1011

1101

1100

1110

⇒ In a microwave power measurement using bolometer, the principle of working is variation of

inductance with absorption of power

resistance with absorption of power

capacitance with absorption of power

cavity dimension with heat generated by power

⇒ The amplifier network is shown bel

6.42 kΩ, 5.6 kΩ

6.42 Ω, (5.62) kΩ

6.4kΩ, (5.62) kΩ

6.42 Ω, 5.6 kΩ

⇒ The normal operation of JFET is

constant voltage region

constant current region

both constant voltage and constant current regions

either constant voltage or constant current region

⇒ In the circuit shown in the figure the power dissipated in 30 Ω resistor will be maximum if the value of

30 Ω

10 Ω

9 Ω

zero

⇒ The Z-inverse of the given Z-transform is _______

unit step

unit ramp

unit impulse

unit parabola

⇒ A planar graph has 6 nodes and 7 branches. The number of meshes in the dual graph is

2

3

4

6

⇒ A silicon PN junction with no bias have a doping concentration

3.345 x 10

^{-3}cm

3.345 x 10

^{-4}cm

3.345 x 10

^{-5}cm

3.345 x 10

^{-6}cm

⇒ In P-N junction, the region containing the uncompensated acceptor and donor ions is called

transition zone

depletion region

neutral region

active region

⇒ For measuring temperatures below 800°C with high accuracy, the best instrument is

optical pyrometer

thermistor based thermometer

GaAs junction diode thermometer

platinum resistance thermometer