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. | A microwave link uses only line-of-sight propagation. |

A. | TRUE [Correct Answer] |

B. | FALSE [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 :**

⇒ When time constant T in any factor is varied, the shapes of log magnitude and phase angle curves remain the same.

TRUE

FALSE

⇒ Two linearly polarized plane waves

*A*and

*B*travelling in free space in the positive

*x*direction meet at a point. Wave

*A*is polarized in the

*y*direction and the wave

*B*is polarized in the

*z*direction. If the two waves are of equal amplitude and are in phase quadrature, the resultant wave will be

circularly polarized

elliptically polarized

linearly polarized

vertically polarized

⇒ In a cycloconverter it is possible to vary

only output frequency

only output voltage

both output voltage and frequency but not simultaneously

both output voltage and output frequency simultaneously

⇒ The phase angle corresponding to λ/4 in a standing-wave pattern is

30°

90°

135°

180°

⇒ Two ammeters A and B both 0-10 A have internal resistance of 1 Ω and 0.5 Ω respectively. They are connected in parallel. If total current is 15 A, then

I

_{A}= I

_{B}= 7.5 A

I

_{A}= 5 A, I

_{B}= 10 A

I

_{A}= 10 A, I

_{B}= 5 A

I

_{A}= 9 A, I

_{B}= 6 A

⇒ A long specimen of P type semiconductor material

is + vely charged

is electrically neutral

has an electric field directed along its length

acts as a dipole

⇒ According to Siegel and Labus, antenna can be treated as

closed transmission line

shorted transmission line

earthed transmission line

opened-out transmission line

⇒ In an R-L circuit excited by a battery of voltage E, the current and voltage across resistor are 1-

*e*

^{-t}and 2(1 -

*e*

^{-t}) respectively. If there were an initial current of 2 A in the inductance, the voltage across resistance would have been

1 -

*e*

^{-t}

2 - 2

*e*

^{-t}

2 + 2

*e*

^{-t}

4 - 4

*e*

^{-t}

⇒ In a series LCR circuit the maximum inductor voltage is twice the maximum capacitor voltage however current lags by 30° and drop across the inductance is

*v*

*= 100 sin 377*

_{L}*t*V. Assuming the resistance being 20 Ω, Find the values of the capacitance and inductance.

235 μF, 61.18 μH

230 μF, 61.18 μH

61.18 μF, 230 μH

None of the above

⇒ Consider the following program for 8085

`OACH`

`53 H`

`OADH`

`54 H`

⇒ In which mode of BJT operation are both junctions reverse biased?

Active

Saturation

Cut off

Reverse active

⇒ A network has two branches in parallel. One branch contains impedance Z

_{1}and the other branch has impedance Z

_{2}. If it is fed from an ac voltage V of frequency f, the current through Z

_{1}depends, on

V, Z

_{1}, Z

_{2}

V, Z

_{1}

Z

_{1}, Z

_{2}

V, Z

_{1}, f

⇒ Which of the following is a balanced line?

Coaxial line

Strip line

Microstrip line

TV twin lead

⇒ When performing numerical calculations in floating point arithmetic

- Error may occur due to finite representation of numbers.
- Error may occur due to rounding.
- Error may occur due to finite representation of inherently infinite process.

All

1 and 2 only

1 and 3 only

2 and 3 only

⇒ The maximum number of characters for variable names in C is

4

8

12

16

⇒ Separation property of state-transition matrix is

φ(

*t*-

*t*

_{0}) = φ(

*t*) φ(

*t*

_{0})

φ(

*t*-

*t*

_{0}) = φ

^{-1}(

*t*) φ

^{-1}(

*t*

_{0})

φ(

*t*-

*t*

_{0}) = φ(

*t*) φ

^{-1}(

*t*

_{0})

φ(

*t*-

*t*

_{0}) = φ

^{-1}(

*t*) φ

^{-1}(

*t*

_{0})

⇒

Match the following:

List I (Operator in C) | List II (Priority of Operation) | ||
---|---|---|---|

A. | ! | 1. | 1 |

B. | < > | 2. | 2 |

C. | ∗ | 3. | 3 |

D. | = | 4. | 4 |

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

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

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

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

⇒ A major advantage of TWT over a Klystron lies in its

higher bandwidth

higher gain

higher frequency

higher output

⇒ L/C has the dimension of

time

capacitance

inductance

resistance

⇒ When duct propagation exists

the line of sight and diffraction. Zone concepts are payable

the line of sight and diffraction zone concepts are not applicable

line of sight concept is applicable but diffraction zone concept is applicable

diffraction zone concept is not applicable but line of sight concept is not applicable

⇒

**Assertion (A):** Electrodynamic instrument is not used as ammeter or voltmeter.

**Reason (R):** Electrodynamic instrument is more costly than PMMC and moving iron instrument.

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

⇒ Consider the following expression for the driving point imped

2 and 4

1 and 3

1 and 4

2 and 3

⇒ The inputs to a 3 bit binary adder are 111

_{2}and 110

_{2}. The output will be

101

1101

1111

1110

⇒ A Weston synchronoscope is a

moving coils instrument

moving iron instrument

dynamometer instrument

induction instrument

⇒ Virus is a

computer hardware problem

an operating system

a computer program

a computer language

⇒ Out of the three transforms viz. Z-transform, Laplace transform and Fourier transform

all three are used in continuous time domain

all three are used in both continuous time domain and discrete time domain

Z transform is used in continuous time domain while Laplace and Fourier transforms are used in discrete time domain

Z transform is used is discrete time domain while Laplace and Fourier transforms are used in continuous time domain

⇒ As the viscosity of a liquid increases, the relaxation time

remains constant

increases

decreases

first decreases then increases

⇒ A chopper

converts constant voltage dc into ac and then into variable voltage dc

converts constant voltage dc into variable voltage dc directly

converts ac of one frequency into ac of another frequency

converts ac to dc

⇒ Linear transistor circuits always operate in

saturation region

cut off region

active region

passive region

⇒ Which of the following is an indirect method of generating FM?

Reactance BJT modulator

Armstrong modulation

Varactor diode modulation

Reactive FM modulator