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Q1. | A load commutated chopper circuit has |

A. | one thyristor [Wrong Answer] |

B. | two thyristors [Wrong Answer] |

C. | four thyristors [Correct Answer] |

D. | six thyristors [Wrong Answer] |

View Answer
Explanation:-
Answer : CDiscuss 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 equations satisfy Maxwell's equations?

E

_{x}= E

_{y}= 0, E

_{z}= cos (

*y*-

*ct*)

E

_{x}= E

_{y}= 0, E

_{z}= cos (

*y*-

*ct*)

F

_{y}= cos (

*y*-

*ct*), E

_{x}= E

_{z}= 0

None of these

⇒ Binary multiplication can be done by repeated addition.

TRUE

FALSE

⇒ The first critical frequency nearest the origin of the complex frequency plane for an RL driving point impedance will be

a zero in left half plane

a zero in right half plane

a pole in left half plane

a pole or zero in left half plane

⇒ Which of the following is anti-ferromagnetic material?

CrSb

NIO

MnO

All of the above

⇒ A + A . B =

B

A . B

A

A or B

⇒ The Boolean expression (A + B) (A + C) (B + C) simplifies to

(A + B) C

(A + B) C

(A + B) C

none of these

⇒

**Assertion (A):** The surge current which an SCR can withstand is much higher than rms on state current.

**Reason (R):** The duration of surge current is very small.

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

Both A and R correct but R is not correct explanation of A

A is correct but R is wrong

A is wrong but R is correct

⇒ In the circuit of figure

*v*

_{1}= 8 V and

*v*

_{2}= 0. Which diode will conduct (Assume ideal diod

D

_{1}only

D

_{2}only

Both D

_{1}and D

_{2}

Neither D

_{1}nor D

_{2}

⇒ The magnitude plot of a composite signal

*x*(

*t*) =

*e*

^{2jt}+

*e*

^{3jt}is

Half wave rectified sinusoid

Full wave rectified sinusoid

Exponentially increasing sinusoid

Exponentially decreasing sinusoid

⇒ Quantization error occurs in

D/A converter

A/D converter

both D/A and A/D converter

neither D/A nor A/D converter

⇒ The nodal method of circuit analysis is based on

KVLs, ohm law

KCLs, ohm law

KCLs, KVL

KCL, KVL, ohms law

⇒ Nodal analysis is applicable to __________ .

planar network

planar and Non-planar both

circuit containing only voltage source

non planer

⇒ To select one out of N equally probable events, the number of bits required is

log

_{2}N

log

_{10}N

log

_{e}N

N

⇒ A two-input OR gate is designed for positive logic. However, it is operated with negative logic. The resulting logic operation will then be

OR

AND

NOR

EX-OR

⇒ The circuit in figur

positive clamper

negative clamper

positive peak clipper

negative peak clipper

⇒ Drain feedback bias is often used with

D MOSFETs

E MOSFETs

both D and E MOSFETs

neither D nor E MOSFETs

⇒ In satellite communication, frequency modulation is used because satellite channel has

small bandwidth and negligible noise

large bandwidth and severe noise

maximum bandwidth and minimum noise

high modulation index

⇒ Which mode has the lowest cut off frequency in circular wave guides?

TE

_{01}

TE

_{11}

TE

_{20}

TE

_{21}

⇒ A number of impulses spaced fron one another form an impulse train.

TRUE

FALSE

⇒ FIR digital filter having __________ stability than FIR filter.

good stability

poor stability

stability not guarnteed

poor stability

⇒ A two port network is said to be reciprocal if

*h*

_{12}= -

*h*

_{21}

AD - BC = 1

*y*

_{12}=

*y*

_{21}

all

⇒ Lag compensation permits a high gain at low frequencies.

TRUE

FALSE

⇒ Which of the following conditional statements is not valid in Pascal?

If A > = B then B : = C + D + X

If (N = 45) THEN X : = X + 2 ELSEX : = 0

If A < = B then A : = C * D

If (A > = B) X : Y else X : = Z

⇒

Match the following:

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

A. | Servomotor | 1. | Error detector |

B. | Amplidyne | 2. | Transducer |

C. | Potentiometer | 3. | Actuator |

D. | Flapper valve | 4. | Power amplifier |

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

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

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

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

⇒ In a T flip-flop the output frequency is

same as input frequency

half of I/p frequency

double the input frequency

none

⇒ Addition of a small amount of antimony to germanium will result in

formation of

*p*-type semiconductor

more free electrons than holes in semiconductor

antimony concentrating on the edges of the crystal

increased resistance

⇒ Hexadecimal number E is equal to binary number

1110

1101

1001

1111

⇒ If a complex voltage wave is applied to a pure inductance, the resulting current wave is much smoother than the voltage wave.

TRUE

FALSE

⇒ If a piece of wood is placed in a magnetic field

the magnetic field will not be affected

the magnetic lines of force will bend towards the piece

the magnetic lines of force will bend away from the piece

the flux may increase or decrease

⇒ A plane EM wave is travelling in an unbound loss less dielectric having μ

_{y}= 1 and ε

_{y}= 4, the time average Poynting vector of the wave is 5 W/m

^{3}. The phase velocity

*v*

_{p}(assuming velocity of light as 3 x 10

^{8}m/sec) is

1.5 x 10

^{8}m/sec

3 x 10

^{8}m/sec

2.5 x 10

^{8}m/sec

0.5 x 10

^{8}m/sec