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Q1. | For a 50 Ω resistor for 3 GHz application, the stray capacitance should be less than |

A. | 1 μF [Wrong Answer] |

B. | 1 nF [Wrong Answer] |

C. | 1 pF [Wrong Answer] |

D. | 0.1 pF [Correct Answer] |

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

⇒ In an SSB transmitter one is most likely to find

class C audio amplifier

tuned modulator

class B RF amplifier

class AB power amplifier

⇒ When determining Thevenin's resistance of a circuit

all sources must be open circuited

all sources must be short circuited

all voltages sources must be open circuited and all current sources must be short circuited

all sources must be replaced by their internal resistances

⇒ Class-B amplifier has less efficiency compared to

class A

class B

class C

class A, AB and C

⇒ Which of the following antennas is not wide band?

Marconi

Helical

Folded dipole

Discone

⇒ If two networks are connected in parallel then equivalent

*y*parameter of both is

[

*y*] = [

*y*

_{a}] [

*y*

_{b}]

[

*y*] = [

*y*

_{a}] + [

*y*

_{b}]

[

*y*] = [

*y*

_{a}]/[

*y*

_{b}]

none

⇒ In a material, the Fermi level is located between the centre of the forbidden band and the conduction band. Then what is that material?

A

*p*-type semiconductor

An

*n*-type semiconductor

An intrinsic semiconductor

An insulator

⇒ The analog signal given below is sampled at 1200 samples per second.

*m(t)*= 2 sin 120 p

*t*+ 3 sin 240 p

*t*+ 4 sin 360 p

*t*+ 5 sin 480 p

*t*+ 6 sin 600 p

*t*+ 7 sin 720 p

*t*. The folding (maximum) frequency is __________ .

300 H

*z*

360 H

*z*

600 H

*z*

480 H

*z*

⇒ Two voltages are -5 V and -10 V. In positive logic

-5 V is 1 and -10 V is 0

-10 V is 1 and -5 V is 0

-5 V is 1 in some circuits and 0 in others

-10 V is 1 in some circuits and 0 in others

⇒ When two

`ALU 1C 74181`

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the carry in of first stage connected to carry in of second stage

the carry in of first stage is connected to carry out of second stage

the carry out of first stage is connected to carry out of second stage

⇒ UHF and microwaves in the frequency range 300 MHz to 30 GHz can be best transmitted using __________ propagation

sky wave

ground wave

duct

none of the above

⇒ The use of free wheeling diode in controlled rectifier improves the waveshape of load current.

TRUE

FALSE

⇒ A 4 line to 16 line decoder has

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either (a) or (b)

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⇒ The multiplication time for 10-bit numbers with 1 MHz clock will be

32 μ sec

20 μ sec

21 μ sec

22 μ sec

⇒ The magnitude plot of a rational transfer function G(

*s*) with real coefficients is shown below. Which of the following compensators has such a magnitude p

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⇒ In the circuit shown the voltage V

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_{L120°60 °-90 °0°}

⇒ In a half bridge inverter the gate pulses of the two thyristors have a phase displacement of

60°

90°

120°

180°

⇒ The emitter coupled pair of BJT's gives a linear transfer relation between the differential output voltage and the differential input voltage V

_{id}only when the magnitude of V

_{id}is less a times the thermal voltage, where a is

4

3

2

1

⇒ A time varying magnetic field produces

electric field only

magnetic field only

both magnetic and electric fields

none of the above

⇒ In figure (A) and

A represents PCM and B represents AM

A represents FM and B represents AM

A represents AM and B represents FM

A represents PCM and B represents FM

⇒ If a two port network is represented by an equivalent T network the admittance of series arm in term of ABCD parameter is equal to

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(A - 1)/B

1/B

⇒ If

*x*= 0.1396 radians, the values of 1 - cos

*x*and 2 sin

^{2}(x / 2) using floating point arithmetic with a 4 digit mantissa are respectively

.1000 E - 1 each

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.1000 E - 1 and .9727 E - 2 respectively

.9727 E - 2 and .1000 E - 1 respectively

⇒ __________ switch, a

*T*flip-flop is used as __________ switch, a

*T*flip-flop is used as switch

toggled, delay

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set reset

reset, set

⇒ When load is coupled to class A amplifier through transformer, efficiency decreases.

TRUE

FALSE

⇒ Which of the following is open loop system?

Wind screen wiper

Aqualing

Respiratory system of animal

System for controlling antirocket missiles

⇒ If there are M equally likely and independent messages and M = 2

^{N}where N is an integer, the information in each message is equal to

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0.5 N bits

2 N bits

4 N bits

⇒ For a full wave bridge rectifier supplied with 50 Hz a.c., the lowest ripple frequency will be

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100 Hz

200 Hz

400 Hz

⇒ The equivalent form of the logical expression (ABC + ABC + ABC + ABC + ABC) is:

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(A + B + C)(A + B + C)(A + B + C)

(A + B + C)(A + B + C)(A + B + C)

⇒ Mouse is a very suitable input device for computers.

TRUE

FALSE

⇒ A delta modulation system is designed to operate at 3 times the Nyquist rate for a signal with a 3 KHz bandwidth. The quantization step size is 250 mv. The maximum amplitude of a 1 KHz input sinusoidal for which the delta modulator does not show slope overload is :

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647.87 mV

400 mV

⇒ In anti-ferromagnetic materials, the graph of susceptibility versus temperature shows a sharp maximum at a certain temperature. This temperature is known as

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Neel temperature

Weiss temperature

Bitter temperature