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 radio horizon for space waves is about three-fourth as for as the optical horizon. |

A. | TRUE [Wrong Answer] |

B. | FALSE [Correct 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 :**

⇒ Which of the following statement is false?

A stationary process is always a ergodic process

A ergodic process is always a stationary random process

It is possible to have a stationary random

None of the above

⇒ The standard intermediate frequency for FM ratio is

10.7 MHz

4.5 MHz

75 kHz

455 kHz

⇒ Transfer function of a linear system is 200

*e*

^{-j10ω}The system is a

distortionless Attenuator

amplifier with Phase distortion

distortionless Amplifier

attenuator with Phase distortion

⇒ If

*e*is the charge of an electron, R is the radius of its orbit and ω is the angular velocity of electron, the magnetic dipole moment μ

_{m}of the orbit is |μ

_{m}| =

*e*ωR

^{2}.

TRUE

FALSE

⇒ A current increasing at the rate of 1 A/s is passed through 1 F capacitor. At

*t*= 0,

*i*= 0. The charge stored after 1 second is

0.5 C

1 C

2 C

4 C

⇒ The combination of registers in 8085 is B-C, D-E, H-L only.

TRUE

FALSE

⇒ Figure represen

Varactor

LED

Zener diode

Temperature dependent diode

⇒ When the phase velocity of an EM wave depends on frequency in any medium the phenomenon is called

scattering

polarisation

absorption

dispersion

⇒ If a common emitter amplifier with an emitter resistance R

_{C}has an overall transconductance gain of 1 m A/V, a voltage gain of - 4 and desensitivity of 50, then the value of the emitter resistance R would be

50 kΩ

0.98 kΩ

50 Ω

0.98 Ω

⇒ In a purely inductive circuit, the current __________ the voltage by __________ .

lags, 0°

leads, 90°

lags, 90°

lags, 45°

⇒ The subtraction of a binary number Y from another binary number X, done by adding the 2's complement of Y to X results in a binary number without overflow. This implies that the result is

-ve and is in normal form

-ve and 2's complement form

+ve and is in normal form

+ve and in 2's complement

⇒ Three inductors each 30 mH are connected in delta. The value of inductance or each arm of equivalent star is

10 mH

15 mH

30 mH

90 mH

⇒ Which of the following is anti-ferromagnetic material?

CrSb

NIO

MnO

All of the above

⇒ If each frequency component of

*f*(

*t*) is shifted by p/2, the resulting signal is

Hilbert transform of

*f*(

*t*)

Inverse Hilbert transform of

*f*(

*t*)

Laplace transform of

*f*(

*t*)

Fourier transform of

*f*(

*t*)

⇒

**Assertion (A):** The Laplace transform of a ramp is 1/*s*^{2}.

**Reason (R):** The integral of a unit step function gives an impulse function.

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

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

A is true but R is false

A is false but R is true

⇒ Generally a VCR has

four stationary video heads

two stationary video heads

four rotating video heads

two rotating video heads

⇒ The input 3-dB frequency is :

100 Hz

148 Hz

100 kHz

None

⇒ MS Excel is an application software for financial planning.

TRUE

FALSE

⇒ In a square law modulator, the carrier frequency should be __________ times than the highest modulating frequency.

1

2

4

3

⇒ Dynamic memory cells are constructed using

FETs

MOSFETs

Transistors

Flip flops

⇒ For real and odd signals, the Fourier series coefficient

*a*is __________ .

_{k}purely imaginary and even

purely real and even

purely imaginary and odd

purely real and odd

⇒

**Assertion (A):** At a temperature of 1000 K, thermionic emission current is about 0.1 A/cm^{2} of surface.

**Reason (R):** Thermionic emission current is given by I_{th} = SA_{0} *T*^{2} *e*^{-Ew/kT}.

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 but R is false

A is false but R is true

⇒ In figure V is ideal voltmeter having infinite resistance. It will read __________ v

40

60

0

100

⇒ Which dc servomotor has minimum inertia?

Slotted armature construction

Surface wound armature

Surface wound with stationary rotor

Either (a) or (b)

⇒ Above ferroelectric curie temperature, spontaneous polarization in ferroelectric materials becomes stronger.

TRUE

FALSE

⇒ In a line VSWR of a load is 6 dB. The reflection coefficient will be

0.033

0.33

0.66

3.3

⇒

Match the following:

List I (Amplifier coupling) | List II (Feature) | ||
---|---|---|---|

A. | RC | 1. | High voltage gain and impedance matching |

B. | Inductive | 2. | Ability to amplify dc and low frequency signals |

C. | Transformer | 3. | Minimum non-linear distortion |

D. | Direct | 4. | Low collector supply voltage can be used |

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

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

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

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

⇒ The logic represented by the abbreviation ECL is

Emitter Coupled Logic

Electron Carrier Logic

Encoding Clock Logic

Electrostatic Channel Logic

⇒ A stepper motor is

a two phase induction motor

is a kind of rotating amplifier

is an electromagnetic transducer used to convert an angular position of shaft into electrical signal

is an electromechanical device which actuates a train of step angular movements in response to a train of input pulses on one to one basis

⇒ A current increasing at the rate of 1A/s is passed through a 1 H inductor. At

*t*= 0,

*i*= 0. The flux linkages after 1 sec are

0.5 Wb-turn

1 Wb-turn

2 Wb-turn

4 Wb-turn