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. | If damping ratio is 0.5, the lines joining complex poles with origin are inclined to negative real axis at |

A. | ± 90° [Wrong Answer] |

B. | ± 60° [Correct Answer] |

C. | ± 45° [Wrong Answer] |

D. | ± 30° [Wrong Answer] |

View Answer
Explanation:-
Answer : BDiscuss 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 coaxial RF cable has a characteristic impedance of 50 Ω and C equal to 40 pF/m. The inductance is

1 μ H/m

10 μ H/m

0.1 μ H/m

0.01 μ H/m

⇒ If we need a low noise device, we should use

BJT

FET

thyristor

UJT

⇒

**Assertion (A):** The line integral of B about a closed contour, in a region containing steady current, is μ_{0} times the total net current, following through the contour of integration.

**Reason (R):** The curl of B is equal to μ_{0} times the current density vector J

Both (A) and (R) are true and (R) is the correct explanation of (A)

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

(A) is true but (R) is false

(A) is false but (R) is true

⇒ In a PCM system, if we increase the quantization levels from 2 to 8, how do the relative bandwidth requirements vary?

Get doubled

Get tripled

Remains same

Become eight times

⇒ An electron rises through a voltage of 100 V. The energy acquired by it will be

100 eV

100 joules

(100)

^{1.2}eV

(100)

^{1.2}joules

⇒ The antenna current of an AM transmitter is 8 A. When only the carrier is sent, but it increases to 8.93 A. when the carrier is sinusoidally modulated. The percentage modulation is nearly

0.9

0.8

0.75

0.7

⇒ A lossless transmission line with air dielectric is 6 m long. What is the line length at 30 MHz?

1 wavelength long

0.5 wavelength long

0.6 wavelength long

0.25 wavelength long

⇒ Two wattmeter method for 3 phase power measurement can be used only for

balanced loads

unbalanced loads

both balanced and unbalanced loads

star connected loads

⇒ The number of valence electrons in silicon atom is

4

2

1

zero

⇒ The precision of an instrument indicates its ability to reproduce a certain reading with a given

drift

resolutions

shift

consistency

⇒ In a negative feedback amplifier A = 100, β = 0.04 and V

_{s}= 50 mV, then feedback will be

4

8

10

2

⇒ Half bridge and full bridge inverters of one type use different commutation methods.

TRUE

FALSE

⇒ Consider the transmission line of length 37.5 cm, which is terminated into zero resistance. This line is being exited by a source of 1 GHz which has an internal impedance of 50 Ω. What is the input impedance of the line as seen by the source?

50 Ω

Zero Ω

100 Ω

Infinite Ω

⇒ A hollow rectangular waveguide has dimensions

*a*= 2

*b*. Calculate the amount of attenuation, if the frequency is 3 GHz, and

*b*= 1 cm.

49

47.33

50.33

50

⇒ For a series circuit of R and variable X

_{L}the admittance locus is

a semicircle in first quadrant

a semicircle in fourth quadrant

a straight line in first quadrant

a straight line in fourth quadrant

⇒ When an electron rises through a potential of 100 V it will acquired an energy of

100 eV

100 Joules

100 ergs

100 x 10

^{-6}Newtons

⇒ The op-amp circuit shown in the figure is a filter. The type of filter and its cut off type of filter and its cut off frequency are respectiv

high Pass, 1000 rad/sec

low Pass, 100 rad/sec

high Pass, 10000 rad/sec

low pass, 10000 rad/sec

⇒ In the television system in India, the odd and even fields are scanned

25 times each

25 times each but alternately

50 times each

50 times each but alternately

⇒

**Assertion (A):** In an op-amp the gain bandwidth product equals *f*_{finity}

**Reason (R):** The change in open loop gain of an amplifier has almost no effect on closed loop gain

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

Both A and R are correct but R is not correct explanation for A

A is correct R is wrong

A is wrong R is correct

⇒ Which capacitor-store higher amount of energy?

Air capacitor

Paper capacitor

Mica capacitor

Plastic film capacitor

⇒ The trapezoidal pattern of figure is obtained when examining an AM wave by an oscilloscope. Modulation factor of the wave

0.33

0.5

2

1

⇒ In a complex wave, the negative half of the wave is a reproduction of the positive half wave. Then

the wave contains only fundamental and third harmonic

the wave does not contain even harmonics

the wave does not contain odd harmonics

the wave does not contain triple harmonics

⇒ The phase angle of lead circuit is

between 0 and -90°

between 0 and +90°

90°

more than 90°

⇒ An air-filled rectangular waveguide has dimensions 8

*cm*x 10

*cm*. The wavelength of waveguide at frequency 3 GH

*z*

25

*cm*

100

*cm*

16.13

*cm*

23.09

*cm*

⇒ Two port network is said to be symmetrical if

Δ

_{h}= 1

Z

_{11}= Z

_{2}

A = Δ

all

⇒ Which of the following has highest resistivity?

Mica

Paraffin wax

Air

Mineral oil

⇒

*x*= AX + B

*u*is a state equation.

TRUE

FALSE

⇒ State variables which describe a system are a unique set.

TRUE

FALSE

⇒ A full wave diode rectifier using centre tapped transformer has diodes with forward resistance of 50 ohms each. The load resistance of 50 ohms each. The load resistance is also 50 ohms. The voltage regulation is

0.2

0.5

1

2

⇒ Electric dipole is located at origin in a medium with ε

_{r}= 6, has a moment P = (4

*a*- 2

_{x}*a*+

_{y}*a*)

_{z}*n*C. Then potential at (2, 4, 4) is:

0.062

0.027

0.042

0.072