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Q1. | Which of the following features is not associated with Nichols chart? |

A. | (0 dB, -180°) point on Nichols chart represent critical Point (-1, 0) [Wrong Answer] |

B. | It is symmetric about -180° [Wrong Answer] |

C. | M loci are centred about (0 dB, -180°) point [Wrong Answer] |

D. | The frequency at intersection of G(jω) locus and M = +3 dB locus gives bandwidth of closed loop system [Correct Answer] |

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

⇒ A rectangular waveguide, in dominant TE mode, has dimensions 10

*cm*x 15

*cm*. The cut off frequency is

10 GH

*z*

1 GH

*z*

15 GH

*z*

25 GH

*z*

⇒ A full adder has two outputs SUM and CARRY.

TRUE

FALSE

⇒ Figure sho

bipolar transistor

JFET

*p*-channel MOSFET

*n*-channel enhancement MOSFET

⇒ The circuit shown depic

voltage series negative feedback

voltage shunt negative feedback

current series negative feedback

current shunt negative feedback

⇒ Which one of the following is the correct statement? The region of convergence of

*z*transform of

*x*[

*n*] consists of the values of

*z*for which

*x*[

*n*]

*r*

^{-n}is

absolutely integrable

absolutely summable

unity

< 1

⇒ The correct sequence of events to improve system stability is

insert derivative action, use negative feedback, reduce gain

reduce gain, use negative feedback, insert derivative action

reduce gain, insert derivative feedback, use negative feed back

use negative feedback, reduce gain, insert derivative action

⇒ In the circuit of figure the current through 5 Ω resistance at

*t*= 0

^{+00.4166666666666676.67 A5.1 A}

⇒ The thermionic emission current is given by

Fermi-Dirac distribution

Maxwell's equation

Richardson Dushman equation

Langmuir Child law

⇒ The block diagram of the given figure

On-off controller

On-off controller with differential gap

On-off controller with integral gap

Three position controller

⇒ The decimal equivalent of the hexadecimal number E 5 is

279

229

327

0

⇒ In a single sideband suppressed carrier AM system, the modulation index is changed from 0 to 1, the power content of the signal

will be quarter

will be doubled

will increase by 50 percent

will increase by 25 percent

⇒ In microprocessor 8088

8 data bits are multiplexed with 8 least significant bits of address bus

8 data bits are multiplexed with 8 most significant bits of address bus

16 data bits are multiplexed with 16 bits of address bus

none of the above

⇒ In Pulse Code Modulation system

large bandwidth is required

quantising noise can be overcome by companding

quantising noise can be reduced by decreasing the number of standard levels

suffers from the disadvantage of its incompatibly with TDM

⇒ A function

*f*(

*t*) =

*k*is

stable

marginal stable

unstable

none

⇒ Auto correlation for t = 0 is equal to

average power S of waveform

square of average power S of waveform

half of average power S of waveform

square root of average power S of waveform

⇒ A channel has a SNR of 7 and BW 4 kHz. Keeping the channel capacity (BPS) same, the BW is reduced to accommodate more channels. The SNR

decreases

increases

remains same

partially affected

⇒ In admittance parameter set, the dependent variables are the currents at the two ports.

TRUE

FALSE

⇒ The PAM Signal can be detected by

Band pass filter

Band stop filter

High pass filter

Low pass filter

⇒ At t = 0

^{+}, the current

*i*

_{1- V/2R- V/4R- V/Rzero}

⇒ Thermistor is used in

temperature measurement

temperature control

high temperature alarm circuits of devices

all of the above

⇒ The characteristic equation for the next state (Q

_{n+1}) of a J-K flip-flop is

Q

_{n+1}= JQ

_{n}+ KQ

_{n}

Q

_{n+1}= JQ

_{n}+ KQ

_{n}

Q

_{n+1}= JQ

_{n}+ KQ

_{n}

Q

_{n+1}= JQ

_{n}+ KQ

_{n}

⇒

**Assertion (A):** Typical value of thermal resistance from source to sink of an SCR is about 0.3° C/W

**Reason (R):** Heat sinks of thyristors are generally made of aluminium.

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

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

A is correct but R is wrong

A is wrong but R is correct

⇒ A mod 4 counter will count

from 0 to 4

from 0 to 3

from any number n to n + 4

none of the above

⇒ Initially the number decimal 8 is stored. If instruction

`RAL`

is executed twice, the final number stored will bedecimals 8

decimal 16

decimal 32

decimal 2

⇒ A 6 bit R-2

*R*ladder D/A converter has a reference voltage of 6.5 V. It meets standard linearity then resolution in percent and volts.

3% 7 V

6.4 V, 2%

0.1%, 1.57 V

1.57%, 0.1 V

⇒ In a series R, L, C circuit the impedance triangle is the same when X

_{L}< X

_{C}and X

_{L}> X

_{C}.

TRUE

FALSE

⇒ Consider the following statements about a magic tee

- The collinear arms are isolated from each other.
- On of the collinear arms is isolated from E arm.
- On of the collinear arms is isolated from H arm.
- E and H arms are isolated from each other.

1 and 2 are correct

1 and 3 are correct

1 and 4 are correct

2 and 3 are correct

⇒ A counter has 4 flip flops. It divides the input frequency by

4

2

8

16

⇒ The abbreviation DTL stands for

Digital Timing Logic

Diode Transistor Logic

Dynamic Transient Logic

Delayed Tracking Logic

⇒ Generally the wall thickness of rectangular waveguide is

about 1-5 mils

about 40-100 mils

about 0.1 to 0.5 mils

about 500 mils