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Q1. | In a single phase cycloconverter with centre tapped transformer |

A. | all thyristors carry currents for equal duration [Wrong Answer] |

B. | the durations of currents in all thyristors may or may not be equal [Correct Answer] |

C. | the durations of currents in all thyristors cannot be equal [Wrong Answer] |

D. | the duration of currents in all thyristors must be equal for satisfactory operation [Wrong Answer] |

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

⇒ Which binary addition is incorrect?

1101.1 + 1011.1 = 11001.0

101101 + 1101101 + 1100011

0.0011 + 0.1110 + 1.0001

1100.001 + 1011.011 = 10111.100

⇒ A

*n*-type silicon sample contains a donor concentration of N

_{d}= 2 x 10

^{16}cm

^{-3}. The minority carrier hole lifetime is t

_{p0}= 5 μs. The thermal equilibrium generation rate of hole is:

1.125 x 10

^{9}cm

^{-3}s

^{-1}

0.625 x 10

^{9}cm

^{-3}s

^{-1}

4.5 x 10

^{9}cm

^{-3}s

^{-1}

2.25 x 10

^{9}cm

^{-3}s

^{-1}

⇒ Which of these has degenerate

*p*and

*n*materials?

Zener diode

PIN diode

Tunnel diode

Photo diode

⇒ Which of the following logic family is fastest of all?

TTL

RTL

DCTL

ECL

⇒ Two similar coupled coils are connected in series. The total inductance in series aiding connection is 100 mH. If currents is 3 A, the energy stored in magnetic field is

0.9 J

0.45 J

0.225 J

1.8 J

⇒ Multiplex techniques are used for

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low density point-to-point communications

high-density point-to-point communications

all of the above

⇒ In Von-Neumann-or Princeton-type computers, the program

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memory and data memory are clearly distinguished

data and instructions are distinguished at the first stage

none of the above

⇒ In a three input AND gate A = 1, B = 1, C = 0 The output Y =

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⇒ A broadcast radio transmitter radiates 5 kW when the modulation percentage is 60. How much of this is carrier power?

6.66 kW

5 kW

4.9 kW

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⇒ For a good conducting medium the intrinsic impedance is

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ωμ /σ ∠45°

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⇒ For a base current of 10 μA, what is the value of collector current in common emitter if β

_{dc}= 100

10 μA

100 μA

1 mA

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⇒ The analog signal given below is sampled at 1200 samples per second.

*m(t)*= 2 sin 120 p

*t*+ 3 sin 240 p

*t*+ 4 sin 360 p

*t*+ 5 sin 480 p

*t*+ 6 sin 600 p

*t*+ 7 sin 720 p

*t*. The folding (maximum) frequency is __________ .

300 H

*z*

360 H

*z*

600 H

*z*

480 H

*z*

⇒ The unit of displacement density is

volt/metre

ampere/metre

^{2}

coulombs/metre

coulombs/metre

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⇒ If X = 1 in the logic equation [X + Z { Y + (Z + X Y)}] { X + Z (X + Y)} = 1, then

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signal energy

⇒ In a series RLC circuit the dB level of currents at half power frequencies as compared to current at resonance is

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⇒ The circuit in figure has reached steady values with switch open. If switch is closed at

*t*= 0 the voltage across 2 μF capacitance at

*t*= 0

^{+zero4 V6 V10 V}

⇒ A pulsed radar produces 1 μ sec pulses at a rate of 1000 per second. The duty cycle is

0.001

0.01

0.1

1

⇒ A short vertical grounded antenna is required to radiate at 1 MHz. The effective height of the antenna is 302 m. The calculated value of radiation resistance is

1.58 Ω

158 Ω

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none

⇒ The maximum efficiency of class A amplifier is

1

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TRUE

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⇒ Two coils X of 1000 turns and Y of 2000 turns are placed such that 60% of the flux produced by coil X links coil Y. A current of 1 A in coil X produces 0.1 wb flux. The mutual inductance between coils is

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⇒ In the transformer shown in the figure, the inductance measured across the terminal 1 and 2 was 4 H with open terminals 3 and 4. It was 3H when the terminals 3 and 4 were short circuited. The coefficient of coupling woul

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indetermine due to insufficient data

⇒ The microprograms provided by a manufacturer to be used on his microprogrammed computer are generally called

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⇒ Which one of following is correct condition to check the stability of sysytem in terms of impulse response?

Σ(

*x*(

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Σ

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*n*) < 0

Σ

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*n*) = 0

Σ

*x*(

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⇒ In 8085 microprocessor the value of the most significant bit of the result following the execution of any arithmetic or Boolean instruction is stored in

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⇒ The permanent magnet field system of brushless dc servo- motor is generally on

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⇒ Using 4-bit numbers (

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_{2}, how is

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*s*complement?

1011

_{2}

1101

_{2}

1100

_{2}

0101

_{2}