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Q1. | On load tap changer using thyristors can have a maximum of two taps. |

A. | TRUE [Wrong Answer] |

B. | FALSE [Correct Answer] |

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Explanation:-
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**Also Read Similar Questions Below :**

⇒

Match the following:

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

A. | Very low response at very high frequencies | 1. | Low-pass system |

B. | Over shoot | 2. | Velocity damping |

C. | Synchro-control transformer output | 3. | Natural frequency |

4. | Phase-sensitive modulation | ||

5. | Damping ratio |

A-1, B-5, C-4

A-3, B-2, C-4

A-2, B-5, C-4

A-4, B-1, C-3

⇒ The Table given below is the mark obtained by 2 students in 8 different subjec

-0.4748

0.4748

-0.0338

0.0338

⇒ A delta modulation system is designed to operate at 3 times the Nyquist rate for a signal with a 3 KHz bandwidth. The quantization step size is 250 mv. The maximum amplitude of a 1 KHz input sinusoidal for which the delta modulator does not show slope overload is :

716.2 mV

500 mV

647.87 mV

400 mV

⇒ Which of the following is not a key word in C?

pop

for

if

union

⇒ The orientation polarization of a polyatomic gas is inversely proportional to absolute temperature.

TRUE

FALSE

⇒ A point charge of 6 μC is located at the origin, uniform line charge density of 180

*n*C/

*m*of 8

*m*length lies along the

*x*axis and a uniform sheet of charge equal to 25

*n*C/

*m*

^{2}of area p x 4

^{2}lies in the

*z*= 0 plane. Calculate total electric flux leaving the surface of sphere of 4

*m*radius centered at origin.

86.97 μC

8.697

*n*C

8.697 μC

86.97

*n*C

⇒ Fidelity of a receiver represents

the sensitivity expressed in terms of voltage that must be applied to the receiver input to give a standard output

the extent to which the receiver is capable of distinguishing between the desired signal and other frequencies

the variation of the output with the modulation frequency when the output impedance is a resistance

none of the above

⇒ Which of the following transducers requires a high input impedance preamplifier for proper measurements?

Thermocouple

Piezoelectric

Thermistor

L.V.D.T

⇒ In a series circuit with X

_{L}constant and R variable the current locus lies in the third quadrant.

TRUE

FALSE

⇒ One XOR gate can work as

one bit magnitude comparator

two bit magnitude comparator

either (a) or (b)

neither (a) nor (b)

⇒ In the graph of figure, the total number of tree

4

5

6

8

⇒ The response shown in figur

over damped

critically damped

under damped

either (a) or (c)

⇒ An ac circuit has an impedance of (3 +

*j*6) ohm for fundamental. The impedance for fifth harmonic is

(15 +

*j*30) Ω

(15 +

*j*6) Ω

(3 +

*j*30) Ω

(3 +

*j*1.2) Ω

⇒ The mean free path of conduction electrons in copper is about 4 x 10

^{-8}m. For a copper block, find the electric field which can give, on an average, 1 eV energy to a conduction electron

2.62 x 10

^{7}V/m

2.64 x 10

^{7}V/m

2.5 x 10

^{7}V/m

2.58 x 10

^{7}V/m

⇒ An electron for which

*l*= 0 has zero orbital magnetic dipole moment.

TRUE

FALSE

⇒ A TV. transmitting aerial is fixed on top of a 150 metre tower located on a mountain 1200 m height. The range of transmitter is

51 km

152 km

152 m

51 m

⇒ A magnetic field exists around

moving charges

static charges

iron

copper

⇒ For a series circuit of variable R and X

_{L}, the impedance locus is

a straight line parallel to X axis in first quadrant

a straight line parallel to X axis in fourth quadrant

a straight line parallel to Y axis in second quadrant

a straight line parallel to Y axis in first quadrant

⇒ Waves of frequencies higher than 30 MHz penetrate the atmosphere.

TRUE

FALSE

⇒ The Central Processing Unit (CPU) of the 16-processor system developed by hardware and software teams of C-DOT, Bangalore is configured around

Motorola 68020

Motorola 68040

Intel 80386

Intel 80486

⇒ A series LCR circuit consisting of R = 20 Ω, | X

_{L}| = 20 Ω and | X

_{C}| = 20 Ω, connected across an A.C. supply of 200 V rms. The rms voltage across the capacitor is

100 ∠ 45

400 ∠ -90°

400 ∠ +90°

100 ∠ -45

⇒ For the two ports in figure,

*y*

_{11}= 8 mho,

*y*

_{12}=

*y*

_{21}= -6 mho and

*y*

_{22}= 6 mho. The values of Y

_{A}, Y

_{B}, Y

_{C}respectively

2, 6, 6 mho

2, 6, 0 mho

2, 0, 6 mho

2, 6, 8 mho

⇒ In a loss-free R-L-C circuit the transient current is

oscillating

square wave

sinusoidal

non-oscillating

⇒ The simplified logic expression for the circuit of the given figur

Y = A

Y = AB

Y = A + B

Y + A + B

⇒ The time constant of a series R-C circuit is given by

R/C

RC

^{2}

RC

R

^{2}C

⇒ In a R-L-C circuit at resonance is

maximum in series resonance and minimum in parallel resonance.

maximum in parallel resonance and minimum in series resonance

minimum in both series and parallel resonances

maximum in both series and parallel resonances.

⇒ An R-L series circuit has R = 5 Ω and L = .01 H. It is fed by ac 50 Hz supply. The rms current in the circuit is 5 A. The active power supplied by the source is

25 W

50 W

125 W

250 W

⇒ The disadvantage of transformer coupling in amplifier is

cost of transformer at audio frequencies

size of transformer at audio frequencies

size of transformer at radio frequencies

cost and size of transformer at audio frequencies

⇒ Computers use RC circuit for edge triggering.

TRUE

FALSE

⇒ The absorption of radio waves by atmosphere depends on

their frequency

their distance from the transmitter

the polarization of atmosphere

the polarization of the waves