Users Also Read

MCQ's Search Engine

Electrical Engineering

Mechanical Engineering

Civil Engineering

Automobile Engineering

Chemical Engineering

Computer Engineering

Electronics Engineering

Medical Science Engg

Q1. | The characteristic equation of a control system is given as s^{4} + 8s^{3} + 24s^{2} + 32s + K = 0. What is the range of values of K for this system to be stable? |

A. | 0 ≤ K < 80 [Correct Answer] |

B. | 0 ≤ K < 100 [Wrong Answer] |

C. | 0 ≤ K < 2300 [Wrong Answer] |

D. | 0 ≤ K < 600 [Wrong Answer] |

View Answer
Explanation:-
Answer : ADiscuss 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 :**

⇒ A conductor in

*x-y*plane and having length 1 m is moving with a velocity V = (2

*i*+ 3

*j*+

*k*) m/sec. A magnetic induction field B = (

*i*+ 2

*j*) Wb/m

^{2}is applied to the conductor. The potential difference between the ends of the conductor is

0

4.88 V

6 V

None of these

⇒ In a 3 input NOR gate, the number of states in which output is 1 equals

1

2

3

4

⇒ A + 1.9 lens has a focal length of 25 mm. The diameter of lens is about

13 mm

1.3 mm

130 mm

none of the above

⇒ In which of the following is the width of junction barrier very small?

Tunnel diode

Photo diode

PIN diode

Schottky diode

⇒ When a current flows through a conductor,

an electric field exists at all points within the conductor

electric field exists only at all points on the surface of the conductor

electric field exists only at ends of the conductor

any of the above depending on magnitude of current

⇒ A rectangular pulse train

*s*(

*t*) is shown in figure is convolved with the signal cos

^{2}(4p x 10

^{3}

*t*). The convolved signal will

DC

12 kHZ sinusoidal

8 kHZ sinusoidal

14 kHZ sinusoidal

⇒ A 2 bit binary multiplier can be implemented using

2 I/P only

2 I/P XOR

*and 4 I/P and gates only*

_{s}two 2 I/P

_{s}NOR and one XNOR gate

XOR gates and shift Register

⇒ If the height of transmitting and receiving antenna in a LOS system are 49 meter and a 9 meter respectively then the distance up to which communication may be possible is about

40 km

110 km

400 km

1100 km

⇒ Which memory does not require programming equipment?

RAM

EPROM

EEPROM

UVPROM

⇒ In a C expression using assignment operators, relational operators and arithmetic operators, the hierarchy of operations (in the absence of parenthesis) is

assignment, relational, arithmetic

relational, assignment, arithmetic

arithmetic, assignment, relational

arithmetic, relational, assignment

⇒ The area of an impulse is

1

0

∞

any finite value

⇒ In a half wave voltage doubler circuit the input frequency is 50 Hz. The ripple frequency is

25 Hz

50 Hz

100 Hz

150 Hz

⇒ For F

_{2}layer the critical frequency is about

500 MHz

100 MHz

25 MHz

10 MHz

⇒

**Assertion (A):** The use of 2's complement has simplified the computer hardware for arithmetic operations

**Reason (R):** 2's complement is obtained by adding 1 to 1's complement.

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 true, R is false

A is false, R is true

⇒ A semi-conductor device that behaves like two SCRs is

UJT

MOSFET

JFET

TRIAC

⇒ Current derating may be necessary when thyristors are operating in

series

parallel

series or parallel

none of the above

⇒ Dynamic memory cells are constructed using

FETs

MOSFETs

Transistors

Flip flops

⇒ The V-I characteristic of a semi-conductor diode is shown in figure. From this figure it can be concluded

The diode is a silicon diode

The diode is a germanium diode

Break down voltage of the diode is 0.7 V

At 1 V rated current will pass through the diode

⇒ Which amplifier has the higher power gain?

Common emitter

Common collector

Common base

Both CC and CE

⇒ In a single phase half wave ac regulator feeding a resistive load, the rms load current

is always positive

may be positive or negative

is always negative

can be even zero

⇒ Consider the following expressions which indicate the step or impulse response of an initially relaxed system

- [5 - 4
*e*^{-2t}]*u*(*t*) - [
*e*^{-2t}+ 5]*u*(*t*) *d*(*t*) + 8*e*^{-2t}*u*(*t*)*d*(*t*) + 4*e*^{-2t}*u*(*t*)

1 and 3

1 and 4

2 and 4

2 and 3

⇒ K maps can be drawn

only for 2 variables

only for 3 variables

only for 4 variables

for any number of variables

⇒ In a class C power amplifier the input signal has a frequency of 250 kHz. If the collector current pulses are 0.1 μs wide, the duty cycle of current waveform is

0.5

0.25

0.025

0.0025

⇒ Which of the following factor does NOT contribute to the drift of a geostationary satellite from its stationary position in space?

Pressure of solar radiations

Gravitational changes due to Sun and Moon

Oblateness of the Earth

Weight of the satellite

⇒ In a tape recorder

both record and erase heads have high permeability core

the record head has high permeability core but the erase head has low permeability core

the record head has low permeability core but the erase head has high permeability core

both record and erase heads have low permeability core

⇒ In photoelectric emission the maximum kinetic energy of emitted electron is proportional to

*f*

*f*

*f*

^{2}

*f*

^{3}

⇒ In an air cored coil, a current of 0.7 A causes a flux of 5 x 10

^{-6}Wb. If the core is made of cast iron and the coil is similar, the same current can set up a flux of about

5 x 10

^{-6}Wb

5 x 10

^{-8}Wb

10

^{-2}Wb

5 x 10

^{-4}Wb

⇒ Load Z

_{L}for maximum power transfe

R

R +

*j*ωL

R -

*j*ωL

none

⇒

Match the following:

List I (Transducer) | List II (Operation) | ||
---|---|---|---|

A. | Bourden tube | 1. | Fluid flow to resistance change |

B. | Hot wire ammeter | 2. | Velocity to pressure |

C. | Hydrometer | 3. | Pressure to displacement |

D. | Pitot tube | 4. | Specific gravity to displacement |

A-1, B-3, C-2, D-4

A-3, B-1, C-2, D-4

A-3, B-1, C-4, D-2

A-4, B-2, C-3, D-1

⇒ The 4 point Discrete Fourier Transform (DFT) of a discrete time sequence {1, 0, 2, 3} is

[0, - 2 + 2

*j*, 2, - 2 - 2

*j*]

[2, 2 + 2

*j*, 6, 2 - 2

*j*]

[6, 1 - 3

*j*, 2, 1 + 3]

[6, - 1 + 3

*j*, 0, - 1 - 3

*j*]