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Q1. | For a periodic waveform, the power spectral density and correlation function form |

A. | a Laplace transform pair [Wrong Answer] |

B. | a Fourier transform pair [Correct Answer] |

C. | either (a) or (b) [Wrong Answer] |

D. | neither (a) nor (b) [Wrong Answer] |

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

⇒ The effective value of the waveform in the given figur

5

2.5

2.5

5.0

⇒ The secondary lobes in binomial arrays can be reduced by

maintaining spacing between two consecutive radiating sources less than λ/2

maintaining the amplitudes in radiating sources, from outer towards the centre source, proportional to the coefficients of the successive terms of the binomial series

both (a) and (b)

none of the above

⇒ The addressing mode depicted in the given figur

direct

register

register indirect

immediate

⇒ Which of the following will increase the antenna radiation efficiency?

Use of larger section of conductor

Providing insulation on conductor

Top loading of antenna

Any of the above

⇒ The correct relation between joules and calories is

calories = joules/4.156

joules = calories/4.156

calories = joules x 10

^{7}/4.156

joules = calories x 10

^{7}/4.156

⇒ In a digital circuit, a clock is a

crystal type

multivibrator

flip-flop

free running multivibrator

⇒ What will be FSV in 2 bit BCD D/A converter is a weighted resistor type with E

_{R}= 1V, R = 1 MΩ and R

*= 10KΩ*

_{f}0.99 V

0.9 V

0.1 V

0

⇒

**Assertion (A):** In two wattmeter method of 3 phase power measurement, one of the wattmeters would read negative if power factor of load is less than 0.5.

**Reason (R):** In two wattmeter method of 3 phase power measurement, both the wattmeters would show equal readings if power factor of load is unity.

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

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

A is true R is false

A is false R is true

⇒ Which of the following has highest power gain?

CE

CC

CB

CB or CC

⇒ If

*f*is the frequency of electromagnetic wave,

*f*

*is cutoff frequency, then in a rectangular waveguide*

_{c}attenuation is low when

*f*>

*f*

_{c}attenuation is low when

*f*<

*f*

_{c}attenuation is high when

*f*<

*f*

_{c}either (b) or (c)

⇒ In a rectangular waveguide if operating frequency is greater than cut off frequency then propagation constant is

purely real

purely imaginary

equal to unit

a complex number

⇒ In a dual converter operated in circulating current mode, the circulating current flows

when load current is zero

when load current is non-zero

even when load current is zero

none of the above

⇒ Of the various capacitances associated with a junction transistor the gain bandwidth product is affected to maximum extend by

base collector parasitic capacitor

base collector space charge layer capacitance

base emitter space charge layer capacitance

base emitter diffusion capacitance

⇒ A current increasing at the rate of 1A/s is passed through a 1 H inductor. At

*t*= 0,

*i*= 0. The flux linkages after 1 sec are

0.5 Wb-turn

1 Wb-turn

2 Wb-turn

4 Wb-turn

⇒ The circuit of figure is used to measure the value R

_{x}. Ammeter resistance R

_{a}= 0.1 Ω voltmeter resistance R

_{v}= 5000 Ω. It R

_{x1}and R

_{x2}, are the measured values of R

_{x}with switch in position 1 and 2, the mean of R

_{x1}, and R

_{x2},

9.98 Ω

10 Ω

10.04 Ω

10.1 Ω

⇒ In figure, the current

0.0416666666666667

0.0833333333333333

0.166666666666667

0.333333333333333

⇒ A long periodic antenna is a

frequency independent antenna

frequency dependent antenna

directional antenna

none of the above

⇒ The integral of a unit impulse is unit step function.

TRUE

FALSE

⇒ A first order system will never be able to give a __________ response.

- Band pass
- Band reject
- All pass

1, 2 and 3 are true

1 and 3 are true, 2 is false

1 and 2 are false, 3 is true

1 and 2 are true, 3 is false

⇒ Which of the following is type declaration statement in C?

int bar

*s*=

*s*+ 1

king = horse + 1

prin = prin * prin

⇒ The holes diffuse from P-region to the N-region in a P-N junction diode because

there is greater concentration of holes in the P-region as compared to N-region

there is greater concentration of holes in the N-region as compared to P-region

the free electrons in the N-region attract them

potential difference facilities such transfer

⇒ Which of these statements is correct?

Ridge guide is essentially a form of capacitively loaded guide.

Ridge guide is essentially a form of inductively loaded guide.

Ridge guide is essentially a form of resistively loaded guide.

Ridge guide has higher power handling capacity than rectangular waveguide.

⇒ In the given circuit, the switch is open for a long time. At time

*t*= 0, the switch is closed. What are the initial and final values of voltages across the induc

0 V and 0 V

0 V and 80 V

80 V and 0 V

80 V and 80 V

⇒ Over which frequency range the effect of atmospheric noise is significant?

Over 35 MHz

Below 30 MHz

Between 30 MHz and 100 MHz

Between 100 MHz and 150 MHz

⇒ A rectangular waveguide having TE

_{10}mode as dominant mode is having a cut off frequency of 18 GHz for the TE

_{30}mode. The inner broad wall dimension of the rectangular waveguide is

5/3 cm

5 cm

5/2 cm

10 cm

⇒ Power monitor and reflectometer use the principle of

directional coupler

klystron amplifier

Gunn diode

TWT

⇒ A copper specimen has resistivity equal to 1.8 x 10

^{-8}ohm-m at room temperature. At a temperature of 700 K, the resistivity is likely to be

1.6 x 10

^{-8}Ω-m

2 x 10

^{-8}Ω-m

3 x 10

^{-8}Ω-m

6 x 10

^{-8}Ω-m

⇒ A 50 p characteristic impedance line is connected to a load which shows a reflection coefficients of 0.268. If V

_{in}= 15 volt, then the net power delivered to the load will be

0.139 W

1.39 W

0.278 W

2.78 W

⇒ For a transfer function the coefficients of the numerator and denominator polynomials in s must be real.

TRUE

FALSE

⇒ Thermistor is used in

temperature measurement

temperature control

high temperature alarm circuits of devices

all of the above