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 braking torque in single phase energy meter is proportional to speed of disc. |

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 :**

⇒ As frequency increases, the transmission efficiency

decreases

increases

is not affected

either (a) or (c)

⇒ The load impedance Z

_{L}of a CE amplifier has R and L in series. The phase difference between output and input will be

180°

0

more than 90° but less than 180°

more than 180° but less than 270°

⇒ Consider a multiplexer with X and Y as data inputs and Z as control input. Z = 0 selects input X and Z = 1 selects input Y. What are the connections required to realize the 2-variable Boolean function

*f*= T + R, without using any additional hardware?

R to X, 1 to Y, T to Z

T to X, R to Y, T to Z

T to X, R to Y, 0 to Z

R to X, 0 to Y, T to Z

⇒ The magnitude plot of a composite signal

*x(t)*=

*e*

^{3jt}+

*e*

^{4jt}is __________ .

Half wave rectified sinusoid

Full wave rectified sinusoid

Exponentially increasing sinusoid

Exponentially decreasing sinusoid

⇒ In ac circuits maximum power is delivered to a load if load impedance is conjugate of source impedance.

TRUE

FALSE

⇒ If a sample of germanium and a sample of Si have the impurity density and are kept at room temperature then

both will have equal value of resistivity

both will have equal -ve resistivity

resistivity of germanium will be higher than that of silicon

resistivity of Si will be higher than of germanium

⇒ A 360 W carrier is simultaneously modulated by two audio wave with modulation percentage of 55 and 65 respectively. Total sideband power radiated will be

500 W

360 W

180 W

130 W

⇒ In cellular telephone each cell is designed to handle

45 two way communications

90 two way communications

45 one way communications

180 two way communications

⇒ The voltage and current distributions on a grounded λ/4 dipole (Marconi antenna) are similar to those of a half wave dipole in space.

TRUE

FALSE

⇒ Antenna reciprocity is put to use in

radar system

commercial broadcast

TV broadcast system

none of the above

⇒ Which one of the following circuits is most suitable as an oscillator at a frequency of 100Hz?

Hartley oscillator

Colpitts oscillator

Crystal oscillator

Twin-T oscillator

⇒

**Assertion (A):** For a reciprocal microwave junction the *S* matrix is symmetrical.

**Reason (R):** In a symmetrical matrix *S _{ij}* =

*S*.

_{ji}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 correct but R is wrong

A is wrong but R is correct

⇒ Two sinusoidal signals of same amplitude and frequencies 10 kHz and 10.1 kHz are added together. The combined signal is given to an ideal frequency detector. The output of the detector is

0.1 kHz sinusoidal

10.1 kHz sinusoidal

a linear function

a constant

⇒

Match the following:

List I | List II | ||
---|---|---|---|

A. | PMMC | 1. | Square law type scale |

B. | Moving iron | 2. | Very good response |

C. | Thermo-couple | 3. | Linear scale |

D. | Electrostatic | 4. | Voltmeter |

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

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

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

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

⇒ Which of the following is error correcting code?

EBCDIC

Gray

Hamming

ASCII

⇒ When a line of any odd multiple of a quarter wavelength is short-circuited it represents

unit impedance

infinite impedance

zero impedance

none of the above

⇒ Some types of traps used in video IF amplifier of colour TV are

shunt traps

series traps

absorption traps

all of the above

⇒ 1101

_{2}- 1001

_{2}=

1000

100

10

1

⇒ The power gain of a half-wave dipole with respect to an isotropic radiator is

2.15 db

3 db

4.15 db

6 db

⇒

Match the following:

List I (Modulation ) | List II (Modulation Index) | ||
---|---|---|---|

A. | DSBFC | 1. | μ > 1 |

B. | DSBSC | 2. | μ > 0 |

C. | SSB | 3. | ∞ |

4. | μ, any value |

A-2, B-2, C-3

A-1, B-3, C-3

A-4, B-2, C-1

A-2, B-3, C-1

⇒ The open loop gain of an ideal op-amp is

infinite

very high

neither high nor low

low

⇒ In microstrip line has dielectric material most commonly used is

silicon

rubber

plastic

bakelite

⇒ A uniform plane wave in the free space is normally incident on an infinitely thick dielectric slab (dielectric constant ε

*= 9). The magnitude of the reflection coefficient is*

_{r}0

0.3

0.5

0.8

⇒ A linear time-invariant, causal continuous time system has a rational transfer function with simple poles at

*s*= - 2 and

*s*= - 4, and one simple zero at

*s*= - 1. A unit step

*u*(

*t*) is applied at the input of the system. At steady state, the output has constant value of 1. The impulse response of this system is

[exp (- 2

*t*) + exp (-4

*t*)]

*u*(

*t*)

[-4 exp (- 2

*t*) + 12 exp (-4

*t*) - exp (-

*t*)]

*u*(

*t*)

[-4 exp (- 2

*t*) + 12 exp (-4

*t*)]

*u*(

*t*)

[-0.5 exp (- 2

*t*) + 1.5 exp (-4

*t*)]

*u*(

*t*)

⇒ In a Parallel connection of circuit the bandwidth in terms of R, L, C is

B = 1/RC

B = 1/RL

B = 1/RLC

B = RLC

⇒ Thermosetting polymers are

injection moulded

extruded

cast moulded

none of the above

⇒ In a piezoelectric crystal, the application of mechanical force will cause

plastic deformation of crystal

magnetic dipoles in the crystal

electrical polarization in the crystal

shift in Fermi level

⇒ An increase in temperature increases the width of depletion layer.

TRUE

FALSE

⇒ The function δ (

*t*-

*b*) is a

unit impulse

unit step

unit doublet

none of the above

⇒ Which converter is used in HVDC transmission?

3 pulse

6 pulse

12 pulse

24 pulse